Oceans Embrace BEST Seafood Casserole Creamy Dream

Ingredients

• 1 1/2 lbs (680g) skinless, boneless white fish (cod, haddock, or pollack), cut into 1-inch chunks
• 1 lb (454g) medium shrimp (prawns), peeled and deveined
• 1/2 lb (227g) sea scallops, halved if large
• 1 tbsp olive oil
• 1/2 tsp salt
• 1/4 tsp black pepper
• 4 tbsp (56g) unsalted butter
• 1 medium yellow onion, finely chopped (about 1 cup)
• 2 cloves garlic, minced
• 1/4 cup (30g) all-purpose flour
• 2 cups (473ml) whole milk
• 1/2 cup (118ml) heavy cream (double cream in the UK)
• 1/4 cup dry white wine (optional)
• 1 tbsp chopped fresh parsley
• 1 tbsp chopped fresh dill
• 1 tsp lemon juice
• 1/2 tsp salt (or to taste)
• 1/4 tsp white pepper
• Pinch of nutmeg
• 1 cup (100g) panko breadcrumbs
• 4 tbsp (56g) unsalted butter, melted
• 1/4 cup grated Parmesan cheese (optional)