Black Bean & Corn Salad with Southwestern Lime Dressing

15oz can black beans

15oz can corn (or 1 1/2 cups fresh corn)

1/4 red onion, finely chopped

1/2 to 1 jalapeno pepper, seeded and finely chopped

1/4 bunch fresh cilantro, chopped (leaves only)

1/2 red bell pepper, chopped

1/2 Cup southwestern lime dressing

--Optional--

1/2 Can olives, chopped

1 avocado, cut into bite size chunks

1 handful baby spinach, chopped