Seafood Casserole: Bubbly Bake | Saveur

Ingredients

• 6 tbsp. unsalted butter
• 2 oz. white mushrooms, finely chopped
• 2 cloves garlic, finely chopped
• 1 stalk celery, finely chopped
• ¹⁄₂ small green bell pepper, stemmed, seeded, and finely chopped
• ¹⁄₂ small yellow onion, finely chopped
• ¹⁄₂ cup dry white wine
• 4 tbsp. flour
• 1 ¹⁄₂ cups milk
• ¹⁄₂ cup heavy cream
• 4 oz. cooked lobster meat, cut into 1" pieces
• 4 oz. skinless haddock, pin bones removed, cut into 1" pieces
• 4 large sea scallops, thinly sliced crosswise
• 1 tbsp. fresh lemon juice
• ¹⁄₂ tsp. dry mustard
• Kosher salt and freshly ground black pepper, to taste
• ¹⁄₃ cup fine bread crumbs
• 3 tbsp. grated cheddar cheese
• 1 tsp. paprika
• Roughly chopped parsley, for garnish (optional)