Note: I found this in a Bisquick cookbook. I use the reduced fat version of Bisquick and also use the frozen onion seasoning blend (rather than chopping onion) that you see in many of my recipes. That makes this recipe even easier to make!
Source: Bisquick Cookbook
1 lb. ground beef
1 cup chopped onion (I use the frozen onion seasoning blend.)
1/2 t. salt
1 cup shredded Cheddar
1/2 cup Bisquick baking mix (I use the reduced fat version.)
1 cup milk
Preheat oven to 400 degrees. Cook ground beef and onion over medium heat until meat is browned. Drain and stir in salt. Pour meat mixture into a greased pie plate. Sprinkle cheese over meat mixture. Mix remaining ingredients and spread evenly over all. Bake for 25 minutes or until knife inserted into center comes out clean. Let pie sit for about 5 minutes before slicing.