Preheat & Prepare:
Preheat oven to 375°F (190°C).
Grease a 9x13-inch baking dish or deep pie dish.
Make the Seafood Filling:
In a large skillet, melt butter over medium heat.
Add diced onion, garlic, celery, and carrots. Sauté for 4-5 minutes until softened.
Stir in Old Bay seasoning, black pepper, and salt.
Sprinkle in the flour and stir, cooking for 1-2 minutes to remove the raw flour taste.
Slowly whisk in the seafood broth and heavy cream. Simmer for 3-4 minutes until thickened.
Add Worcestershire sauce, lemon juice, seafood, peas, corn, and fresh parsley. Stir and let cook for 2-3 minutes until seafood is just cooked. Remove from heat.
Prepare the Cheddar Bay Biscuit Dough:
In a mixing bowl, whisk together flour, baking powder, garlic powder, salt, and Old Bay seasoning.
Fold in shredded cheddar cheese.
Stir in melted butter and buttermilk until a thick dough forms.
Assemble & Bake:
Pour the seafood filling into the prepared baking dish.
Drop biscuit dough in heaping spoonfuls over the filling, spreading slightly but leaving some gaps for steam to escape.
Bake for 20-25 minutes, or until biscuits are golden brown.
Garlic Butter Topping:
In a small bowl, mix melted butter, garlic powder, and dried parsley.
Brush over hot biscuits immediately after baking.
Serve & Enjoy:
Let cool for 5 minutes before serving. Pair with a fresh salad or steamed veggies for a complete meal!