Spread bean dip in a 7x11-inch dish or 14 inch platter. Mix mashed avocados, lemon juice, garlic salt, pepper, and picante sauce; spread over bean dip. Mix sour cream, mayonnaise, and taco seasoning; pour over avocado layer.
Top with green onions, tomatoes, olives, cheddar cheese, and monterey jack cheese in the order given. Serve with tortilla chips.
Servings: 12 - 15