Preheat your oven to 400°F (200°C).
In a large skillet, melt butter over medium heat.
Add chopped onion and sauté until translucent.
Stir in diced carrots and cook for 5 minutes.
Sprinkle flour over the vegetables and stir well.
Slowly pour in chicken broth, stirring constantly.
Add heavy cream, shredded chicken, peas, and corn; season with salt and pepper.
Transfer the filling to a greased pie dish.
Prepare Cheddar Bay Biscuit mix according to package instructions.
Drop spoonfuls of biscuit dough on top of the filling and sprinkle with cheddar cheese.
Bake in the preheated oven for 25-30 minutes or until biscuits are golden brown.