Place chopped green lettuce, 15 ounces drained beans, 1 chopped tomato, ½ chopped pepper, 1 cup corn, 1 avocado, 1 cup purple cabbage, ½ red onion,½ cup scallions, and ½ cup olives into a large salad bowl, saving crispy onions and/or tortilla chips for the garnish on top.