To create your Cheddar Bay Biscuit Seafood Pot Pie, follow these clear and concise steps:

1. Preheat the Oven: Start by preheating your oven to 375°F (190°C).

2. Sauté Vegetables: In a large skillet, melt butter over medium heat. Add the diced onion and celery, sautéing until soft and translucent.

3. Make the Roux: Sprinkle flour over the sautéed vegetables and stir continuously for about 1-2 minutes to create a roux.

4. Add Liquids: Gradually whisk in the seafood broth and heavy cream. Stir until the mixture is smooth and begins to thicken.

5. Season the Filling: Add garlic powder, Old Bay seasoning, salt, and pepper. Stir well to combine.

6. Incorporate the Seafood: Fold in the cooked shrimp, crab meat, and the frozen peas and carrots. Remove from heat.

7. Transfer to Baking Dish: Pour the seafood filling into a 9-inch pie dish or similar baking dish.

8. Prepare the Biscuits: According to package instructions, prepare the Cheddar Bay Biscuits, adding in the shredded cheddar cheese.

9. Top the Filling: Drop spoonfuls of biscuit dough evenly over the seafood filling.

10. Bake the Pot Pie: Place in the preheated oven and bake for 30-40 minutes or until the biscuits are golden brown and fully cooked.

11. Cool and Serve: Let the pot pie cool for 10-15 minutes before serving to allow the filling to set.