This black bean salsa recipe is rich in fiber and protein, and it's delicious, too. This side dish includes all of traditional salsa's familiar ingredients, including chopped tomatoes, green onions and fresh cilantro. Just add a single can of black beans and a cup of frozen, thawed corn to make this a healthy side dish worthy of your next Mexican fiesta. If you have any leftovers, try spreading the concoction over grilled chicken or fish for dinner. We promise you won't be disappointed with the result.