Fish Gratin
A comforting baked fish casserole with a creamy sauce, crunchy breadcrumb topping, and fresh lemon and dill. Perfect for a cozy weeknight dinner.
- Total time
- 40 min
- Servings
- 4
- Calories
- 480
- Protein
- 38g
Ingredients
- 1.5 lb white fish fillets
- 3 tbsp butter
- 3 tbsp all-purpose flour
- 2 cups milk
- ½ cup breadcrumbs
- 1 cup cheddar cheese, grated
- 1 whole lemon
- 2 tbsp fresh dill, chopped
Instructions
- 1
Preheat oven to 400°F. Butter a 9x13 inch baking dish. Place the 1.5 lb fish fillets in the dish in a single layer; season with salt and pepper.
- 2
In a saucepan over medium heat, melt 3 tbsp butter. Whisk in 3 tbsp flour and cook for 1 minute until bubbly.
- 3
Gradually whisk in 2 cups milk. Cook, stirring constantly, until the sauce thickens and coats the back of a spoon, about 5 minutes.
- 4
Remove sauce from heat. Stir in 1 cup grated cheddar and 2 tbsp chopped dill until melted. Pour the sauce evenly over the fish.
- 5
In a small bowl, mix 0.5 cup breadcrumbs with 1 tbsp melted butter (optional). Sprinkle over the sauce.
- 6
Bake for 20-25 minutes, until the fish flakes easily with a fork and the top is golden and bubbling.
- 7
Let rest for 5 minutes. Serve with lemon wedges and extra dill if desired.
Tools you’ll need
- 9x13 inch baking dish
- saucepan
- whisk
- measuring cups and spoons
- knife and cutting board
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