Seafood Gratin with Mushrooms: A Rich and Creamy Delight

Melt butter in a skillet over medium heat. Add garlic and mushrooms, cooking until soft. 🧈🧄🍄
Add shrimp and fish, season with salt, pepper, and lemon juice. Cook for 3 minutes until just opaque. Remove from heat. 🦐🐟🍋
Prepare the creamy gratin sauce:

In a saucepan, melt butter and whisk in flour. Cook for 1 minute. 🧈🍞
Slowly add milk and heavy cream, stirring constantly until thickened. 🥛
Stir in mustard, nutmeg, and shredded cheese. Mix until smooth. 🧀🌿
Assemble the gratin:

Preheat oven to 400°F (200°C). 🔥
Combine the seafood mixture with the creamy sauce and pour into a baking dish.
In a small bowl, mix breadcrumbs, shredded cheese, olive oil, and parsley. Sprinkle over the seafood. 🍞🧀🌿
Bake and serve:

Bake for 15 minutes until golden and bubbly. Let rest for 5 minutes. 🔥⏳
Serve hot with toasted bread or a side salad. Enjoy! 😋
Serving and Storage Tips: