Gluten Free Seven Layer Dip

I can remember the first time that I ever had a seven layer dip. It was at a 4th of July party when I was about 16 years old. You can buy seven layer dips at most grocery stores now, but it was a huge novelty to me then . . . and boy, was it good! Because so many store-bought guacamoles contain wheat (for some unfathomable reason), many pre-made seven layer dips are on the "Celiac No-No List." But it's almost as easy (and generally cheaper) to make your own, anyway. - Betsy