Heather's Cilantro, Black Bean, and Corn Salsa

1 (15 ounce) can yellow corn

drained

1 (15 ounce) can white corn

drained

2 (15 ounce) cans black beans

drained and rinsed

1 (14.5 ounce) can Italian-style diced tomatoes

drained

1 bunch finely chopped cilantro

5 green onions

finely sliced

1 small red onion

finely chopped

1 red bell pepper

seeded and chopped

1 tablespoon minced garlic

¼ cup lime juice

1 avocado - peeled

pitted

and diced

2 tablespoons olive oil

or to taste