Beef and Cheddar Potpie

6 TB Butter
1 sm onion, chopped
1.5 pounds ground sirloin
28 oz can diced tomatoes
1 cup beef broth
salt & pepper
1.5 cups flour
2 tsp baking powder
2 c shredded sharp cheddar cheese
1/2 c milk

Preheat to 375.
Spray 9x13 pan.
In lg pan, heat 2 TB butter over medium high heat.  Add onion and cook til tender but not brown.  Add beef and cook til no longer pink.  Add tomatoes and beef broth and season with salt and pepper.  Reduce heat and let simmer 20 minutes until most of liquid is gone.  Pour into prepared baking dish.

In lg bowl combine flour, baking powder and 1/2 tsp salt.  Using your fingertips blend remaining 4 TB butter and cheese until mixute becomes crumbly.  Gather the dough and make a big ball and press or roll out to 1/2 inch thickness.  Using 3 inch cookie cutter (I used a glass) cut out biscuits.  Re-rolll scraps until all dough has been used up.  Layer biscuits on top of beef mixture and bake for 35 minutes til browned.