Southwest Bean Salad

I got this recipe from a friend who made it for our symphony dinner.  It's great for picnics and barbecues!

1 can black beans
1 can white beans
1 can corn
1 small onion, chopped
1/2 red pepper, chopped
1/2 green pepper, chopped
2 tomatoes, chopped
1 avocado, chopped
1/2 C cilantro, chopped
1 tsp salt
1/2 tsp. pepper
Italian dressing, to taste (about 1/4 C)
Mix it all together and enjoy!