Saute your onions in a lightly greased skillet and set them aside.
Sprinkle your chicken with chili salt and begin cooking it in the skillet.
Grate the Cheese and melt according to directions. I add the milk a little at a time until it gets to a consistency I like. You don't want it to be so thick you can't pour it, but so thin it's like water either.
After you have all your chicken cooked through, put the onions back in the skillet and turn the burner off. Now you are ready to pour your cheese over the top and it is ready to serve!