Layer beans, avocados, thin layer of mayonnaise and sour cream in 9x13 inch pan. top this with a layer of picante and the cheeses. Sprinkle onions and olives on top. Heat oven to 350 degrees and bake for 30 minutes. Serve with corn or tortilla chips.
OPTIONAL: I often do not bake this dip. I put together on serving dish.
OPTIONAL: Add 1 pound ground beef and serve in flour tortillas for a main dish.