This is a Mexican appetizer that is addicting. When it is completed, it looks like a snowy mountain, thus the name. It is a large appetizer that works great for parties. This does not include time for chilling. I got this from my friend Karen when I lived in California. Update (5/31/2013): I realized after a recent review and myself also making this recipe for a Memorial Day cookout, that I make my own changes to the recipe that I didn't add/edit original recipe when posting, so I have now added corrections to the onion/tomato mixture and amounts of cheese.