Easy Beef Pot Pie

1. 1/2 cup chopped onion
2. 2 Tbsp butter
3. 2 cups cooked beef, cut into 1/2" pieces
4. 1 cup frozen peas and carrots, cooked
5. 1 cup diced cooked potatoes
6. 1 cup beef gravy, leftover or purchased
7. 1/4 cup butter
8. 1 1/2 cups flour
9. 1 cup grated Cheddar cheese
10. 2 tsp. sugar
11. 2 tsp. baking powder
12. 1 tsp. salt
13. 1 1/2 cups milk

In a skillet over low heat, melt 2 tablespoons butter; add onions and saute until onions are tender, about 4 minutes. Combine onions with chopped beef, cooked peas and carrots, potatoes, and gravy; set aside. Melt 1/4 cup butter in bottom of 8-inch square baking dish in 350 degree F. oven. Combine flour, cheese, sugar, baking powder, salt, and milk in mixing bowl. Stir until blended. Pour into baking dish then beef mixture over the batter. Do not stir. Bake the beef pie for 55 to 65 minutes, until crust is browned and filling is bubbly