Preheat the oven to 375 degrees.

Spray a 9x13 pan with nonstick spray.

Place the biscuits on a baking sheet and bake for 8 minutes. Remove from oven but leave oven on.

While biscuits are pre-baking, in a large skillet over medium-high heat melt the 1 tablespoon of butter.

Add the frozen vegetables and cook for 10-15 minutes.

Add the chicken, milk and cream of chicken soup, salt and pepper to taste. Stir to combine and heat for 5 minutes until the mixture is fully heated and bubbly hot.

Pour into prepared 9x13 dish and spread evenly.

Take the pre-baked biscuits and place them on top of the casserole with the baked side down and the raw side up.

Place the butter in a small microwaveable dish along with the garlic powder. Microwave until melted (30 second intervals, covered).

Pour the melted butter over the top of the biscuits.

Place the casserole in the oven and bake for 10-12 minutes or until the biscuits are golden brown.