Decadent Seafood Mornay: A Comfort Food Classic Explained

Last Updated on February 12, 2026 by Antoni Recipes Team

There s something simply enchanting about the moment the oven door swings open to reveal a bubbling dish of Seafood Mornay. As the warm aroma of garlic mingles with the fresh zing of lemon and dill, I can t help but be transported back to cozy family gatherings surrounded by laughter and love.

This creamy delight, draped in a luscious sauce and crowned with golden breadcrumbs, has become a staple in my home, effortlessly bridging comfort and elegance. Whether it s a festive Christmas feast or just a weeknight dinner, each forkful promises a delightful celebration of flavors that brings everyone to the table.

Join me as we dive into this classic Australian comfort dish, transforming simple ingredients into a meal that radiates warmth and satisfaction! You ll be amazed at how such a sumptuous plate can come together with ease. Let s make some magic happen in your kitchen!

Why is Seafood Mornay a Must-Try Dish?

Creamy indulgence: This dish boasts a velvety sauce that perfectly complements the delicate seafood, elevating every bite.
Quick to prepare: With straightforward steps, you can whip up this gourmet meal in no time, impressing family and friends alike.
Versatile possibility: Customize with your favorite seafood or veggies, ensuring it suits everyone s taste.
Crowd pleaser: Its rich flavors and creamy texture make it a favorite at gatherings and holiday feasts.
Comfort food: Infused with nostalgia, this dish warms the soul, providing that home-cooked feeling we all crave.

Seafood Mornay Ingredients

For the Sauce

• Butter Adds a rich flavor, but feel free to substitute with margarine for a dairy-free option.
• Onion Provides sweetness and depth; shallots work well too for a milder taste.
• Plain Flour This thickens the sauce; gluten-free flour can be used for those avoiding gluten.
• Milk Creates a creamy base; consider using plant-based milk for a dairy-free alternative.
• Dijon Mustard Adds a punch of tanginess; yellow mustard can serve as a suitable substitute.

For the Seafood

• Seafood The star of the dish! A mix of fish, prawns, or scallops works beautifully for the Seafood Mornay.

For the Topping

• Breadcrumbs Adds a lovely crunch; opt for panko for a lighter texture or gluten-free versions if needed.
• Fresh Dill Enhances the dish with herbal notes; parsley can be a great alternative if dill is unavailable.
• Lemon Zest Brightens the flavor; you can switch it up with lime zest for a different citrus twist.

For Additional Flavor

• Celery Brings a nice crunch and aromatic flavor; if you re out, leeks can stand in perfectly.
• Garlic Adds an aromatic, savory element; remember to blend it into your breadcrumb mix for extra goodness!

By gathering these simple yet essential ingredients, you ll be well on your way to creating a beloved Seafood Mornay that every member of your family will cherish. Let s get cooking!

How to Make Seafood Mornay

1. Preheat the Oven: Set your oven to 200 °C (fan forced) to ensure it s hot and ready for baking.

2. Sauté the Veggies: Melt 50g of butter in a large non-stick pan over medium heat. Sauté the onion and celery for about 3 minutes, stirring until they re softened and fragrant.

3. Cook the Seafood: Increase the heat and add your seafood selection, cooking for 5 minutes until just browned. Then, transfer the seafood to a bowl and set aside.

4. Make the Sauce: In the same pan, melt 60g of butter. Add the plain flour and cook for 1 minute while stirring. Gradually whisk in the milk until the mixture is smooth and creamy.

5. Thicken the Sauce: Bring the sauce to a gentle boil, stirring constantly for 3-5 minutes until it thickens. Stir in the Dijon mustard and half of the fresh dill for flavor.

6. Combine Everything: Gently fold the cooked seafood back into the pan, ensuring even coating with the sauce. Transfer this mixture to an 8-cup ovenproof dish.

7. Prepare the Topping: Melt the remaining butter and mix it with minced garlic and a pinch of salt. Coat the breadcrumbs in this mixture and sprinkle generously over the seafood.

8. Bake and Serve: Place the dish in the oven and bake for about 15 minutes or until the top is golden and bubbly. Serve immediately for that delightful creamy texture!

Optional: Garnish with extra dill for fresh flavor and presentation.
Exact quantities are listed in the recipe card below.

Seafood Mornay Variations & Substitutions

Feel free to get creative with this dish, adjusting flavors and textures to suit your palate!

• Dairy-Free: Use margarine in place of butter and plant-based milk for a creamy, dairy-free alternative.

• Gluten-Free: Swap out plain flour for a gluten-free flour blend to keep the sauce thick and delicious for those avoiding gluten.

• Poultry Option: Substitute the seafood with cooked chicken, which adds a comforting twist while retaining richness.

• Veggie Boost: Stir in fresh spinach or mushrooms for added nutrition and vibrant flavors that complement the Mornay sauce beautifully.

• Cheesy Delight: Grate some Gruyère or cheddar cheese into the sauce before baking for a luscious, cheesy Seafood Mornay that s hard to resist!

• Citrus Twist: Replace lemon zest with lime zest for a fresh, zippy flavor that brightens up the dish even more.

• Herb Variation: If fresh dill isn t on hand, parsley can be used instead, adding a different yet delightful herbal note to the sauce.

• Spicy Kick: For those who love heat, sprinkle some red pepper flakes into the sauce to give your Seafood Mornay an exciting kick, elevating the dish with a touch of warmth.

Expert Tips for Seafood Mornay

• Perfectly Browned Seafood: Ensure the seafood is just browned; overcooking can lead to a rubbery texture. Aim for a warm, golden finish.
• Richness Boost: For added depth of flavor, consider a splash of white wine in the sauce; it complements the seafood beautifully.
• Serving Fresh: Serve the Seafood Mornay immediately after baking to maintain that creamy texture. Letting it sit can make it gummy.
• Customize Easily: Feel free to mix in your favorite vegetables like spinach or mushrooms; they enhance both flavor and nutrition in your Seafood Mornay.
• Breadcrumb Variation: Experiment with different breadcrumbs panko gives a lighter texture, while regular breadcrumbs provide a more classic crunch.

Make Ahead Options

These Seafood Mornay are perfect for meal prep enthusiasts! You can prepare the sauce and seafood mixture up to 24 hours in advance by cooking them through step 6. Once cooled, store them in an airtight container in the refrigerator to maintain their creamy texture and flavor. The breadcrumb topping can also be assembled and kept separate for maximum crunch. When you re ready to bake, simply combine the seafood mixture into an ovenproof dish, top with breadcrumbs, and bake at 200 °C (fan forced) for about 15 minutes until golden and bubbly. This way, you can enjoy a comforting, homemade Seafood Mornay with minimal effort on busy weeknights!

What to Serve with Seafood Mornay?

Creating the perfect dining experience alongside your Seafood Mornay elevates the entire meal, inviting warmth and delight to your table.

• Garlic Bread: The buttery, aromatic crunch complements the creamy dish, perfect for scooping up every last bite of sauce.
• Fresh Green Salad: Crisp greens dressed lightly in vinaigrette add a refreshing contrast, balancing the richness of the Mornay beautifully.
• Steamed Asparagus: With its tender texture and earthy notes, asparagus elevates the seafood flavors while adding a vibrant touch to your plate.
• Risotto: A creamy parmesan risotto offers a delightful creaminess that pairs well, ensuring a luxurious dining experience.
• Roasted Vegetables: Caramelized carrots and potatoes bring natural sweetness, creating a wholesome accompaniment that s as colorful as it is tasty.
• Chardonnay: A chilled glass brings out the seafood s flavors and enhances the richness of the sauce, making it a delightful pairing.
• Chocolate Mousse: End your meal on a sweet note with a light, airy dessert that contrasts with the savory richness of Seafood Mornay.

With these delightful pairings, your Seafood Mornay will shine at any gathering, making moments special and memorable.

Storage Tips for Seafood Mornay

Fridge: Store leftover Seafood Mornay in an airtight container for up to 3 days to maintain freshness and prevent spoilage.

Freezer: You can freeze the dish for up to 2 months. Divide into single servings, wrap well, and place in freezer-safe containers.

Reheating: For best results, reheat in the oven at 180 °C (350 °F) for 15-20 minutes until heated through. This helps restore the creamy texture and bubbly topping.

Thawing: If frozen, it s best to thaw overnight in the fridge before reheating. Avoid microwaving, as it can make the seafood rubbery.

Seafood Mornay Recipe FAQs

What type of seafood is best for Seafood Mornay?
Absolutely! For a classic Seafood Mornay, a mix of fish, prawns, and scallops works beautifully. I often favor using firm white fish, such as cod or haddock, because it holds its shape well in the dish. If you re feeling adventurous, feel free to incorporate other seafood like mussels or crab meat!

How should I store leftover Seafood Mornay?
Leftover Seafood Mornay should go into an airtight container in the fridge for up to 3 days. I recommend using glass containers to maintain freshness. When you re ready to enjoy it again, reheat in the oven at 180 °C (350 °F) for about 15-20 minutes. This method helps keep the creamy texture intact!

Can I freeze Seafood Mornay?
Yes, you can freeze Seafood Mornay! To do this, follow these steps:

1. Allow the dish to cool completely after cooking.
2. Divide it into single servings and place them in freezer-safe containers.
3. Label with the date and freeze for up to 2 months.
   When you re ready to eat, thaw it overnight in the fridge and reheat in a preheated oven at 180 °C (350 °F) until warmed through.

What should I do if the sauce is too thick?
If you find your Seafood Mornay sauce is too thick, don t worry! Simply whisk in a bit more milk over low heat until you reach your desired consistency. If you re starting from scratch and find it too thick while making it, add the milk gradually during the cooking process, stirring constantly.

Is Seafood Mornay suitable for gluten-free diets?
Yes, indeed! To make a gluten-free Seafood Mornay, simply substitute the plain flour with a gluten-free flour blend and ensure your breadcrumbs are also gluten-free. Many people in my circle have dietary preferences, and this dish manages to cater to a variety of needs without sacrificing flavor!

Can I use frozen seafood in this recipe?
Very! Using frozen seafood is a great option, especially for those who want to save time. Just ensure to thaw the seafood completely before using it in your Seafood Mornay. This helps achieve that perfect texture. Plus, be aware of excess moisture when adding it to the dish, as it could affect the sauce s consistency.