When I originally typed this recipe I neglected to put in the 1 cup milk. Here is the correct recipe from the cookbook "What's Cookin'"

Cook onion in 2 T butter or margarine. Set aside. Combine eggs, milk and biscuit mix. Stir until blended. Add onion and 1 C cheese. Spread dough in a small greased bundt pan. Sprinkle top with remaining cheese and 2 T melted butter or margarine.

Bake at 400F for 30-40 minutes or until done. Serve warm.