1 (15 ounce) can kidney beans, drained
1 (15 ounce) can garbanzo beans, drained
1 cup chopped tomatoes
3/4 cup cucumber - peeled, seeded, and chopped
2 tablespoons diced onion
1 (6 ounce) container guacamole
1/2 cup plain yogurt
1/4 teaspoon salt
1/4 cup milk
shredded lettuce
corn tortilla chips