Brown the onions and hamburger together.
Add in a little garlic salt for taste.
Use 1/2 c. of the baking mix and mix in 2 eggs and a cup of milk. Set aside.
Put the browned hamburger/onions in a greased 9" pan.
Sprinkle the cheese on top the brown hamburger.
Pour the baking mix/milk/egg mixture on top of the shredded cheese.
Bake at 400F for 25 minutes or until the top is browned.