Black Bean Avocado Salad

I got this one from allrecipes.com. It's easy and nutritious. I think it works great as a vegetarian main dish (just add some rolls or biscuits on the side) or if you want meat, just throw in a handful of diced chicken.And, um, yes, I do like black beans this much. MMMM, fiberific!

1 (15 ounce) can black beans, rinsed and drained
1 (11 ounce) can Mexicorn, drained
1 1/3 cups chopped peeled avocado
1 cup chopped seeded cucumber
1 cup chopped seeded tomatoes
1/2 cup thinly sliced green onions
1 small jalapeno pepper, seeded and chopped
1 teaspoon lime juice

DRESSING:
2 tablespoons cider vinegar
1 tablespoon olive oil
1 teaspoon ground cumin
1/2 teaspoon dried oregano
1/4 teaspoon salt
1/8 teaspoon pepper

DIRECTIONS
In a large bowl, combine the first eight ingredients. In a small bowl, whisk the dressing ingredients. Pour over salad and toss to coat