Seafood a la King Recipe

Ingredients (12)

• 3 tablespoons butter
• 1 cup chopped onion
• 3 tablespoons all-purpose flour
• 2 cups milk
• 1/2 teaspoon salt
• 1/4 teaspoon white pepper
• 1/8 teaspoon ground nutmeg
• Pinch of cayenne pepper, optional
• 12 ounces tilapia fillets (cut into 2-inch pieces)
• 6 to 8 ounces peeled and deveined cooked shrimp (medium to extra-large are best)
• 4 ounces lump crab
• 1 cup (or more) frozen baby peas