Crab and Shrimp Casserole

Ingredients

• 1 pound lump crab meat
• 1 pound shrimp peeled and deveined
• 2 tablespoons butter
• 1 small onion chopped
• 2 cloves garlic minced
• 1 cup mayonnaise
• 1 cup sour cream
• 1/2 cup milk
• 1 teaspoon Old Bay seasoning
• 1/2 teaspoon paprika
• 1/4 teaspoon cayenne pepper
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1 cup mozzarella cheese shredded
• 1 cup sharp cheddar cheese shredded
• 1/2 cup Parmesan cheese grated
• 1 cup breadcrumbs
• 2 tablespoons fresh parsley chopped