For the Filling:

• 2 tablespoons butter
• 1/2 cup chopped onion
• 1/2 cup diced celery
• 2 cloves garlic, minced
• 1/4 cup all-purpose flour
• 2 cups seafood or chicken broth
• 1/2 cup heavy cream
• 1 teaspoon Old Bay seasoning
• 1/2 teaspoon thyme
• Salt and pepper to taste
• 1 cup cooked shrimp, chopped
• 1 cup cooked crab meat or imitation crab
• 1/2 cup frozen peas
• 1/2 cup diced carrots (steamed or frozen)

For the Cheddar Bay Biscuit Topping:

• 1 1/4 cups all-purpose flour
• 1/2 tablespoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon garlic powder
• 1/4 teaspoon salt
• 1/3 cup cold unsalted butter, cubed
• 1 cup shredded sharp cheddar cheese
• 1/2 cup buttermilk

For Garlic Butter Topping:

• 2 tablespoons melted butter
• 1/4 teaspoon garlic powder
• 1/2 teaspoon dried parsley