Cheeseburger Pie

1 ld. Ground Beef
1/2 C Chopped Onion
1/2 tsp. Salt
1/4 tsp. Pepper
1 C Shredded Cheddar Cheese
1 1/2 C Milk
3 Eggs
3/4 C Buttermilk biscuit mix

In Skillet, brown hamburger with onion. Drain, sprinkle with salt and pepper and spread in a greased pie plate. Top with cheese. Blend milk, eggs and biscuit mix well and pour over cheese. Bake until golden brown. (20-25 minutes @350)