Southwest Salad for a Crowd

Name: Southwest Salad for a Crowd
Ingredients: 4 cans black beans, drained and rinsed; 2 red bell peppers, finely chopped; 1 red onion, finely chopped; 6 ears of corn cut off cob, (or 1 bag frozen corn, defrosted); 1 pound cherry or grape tomatoes, halved; 1 large jalapeño, seeds and veins removed, minced; 2 limes, juiced; 1 lemon, juices; 1 tablespoon high quality chili powder; coarse salt to taste; Bunch cilantro, chopped finely; 3 heads romaine, washed and chopped