My fiancee made this for me the other day. It was awesome, i pretty much ate all of it in the same day.
1 Bag of multigrain tostitos
1 fat free cream cheese
1 can of black beens
1 can rotel tomatoed
1 bag of lowfat shredded cheddar
Spread the cream cheese into the bottom of a baking dish. Pour the black beans and rotel tomatoes over the cream cheese. Sprinkle the bag of cheddar over the whole thing. Bake at 350 until cheese is completely melted.