1 15.5 oz can black beans, rinsed and drained  9 oz frozen (or canned) corn, thawed  1 tomato, chopped  1 avocado, chopped  1/4 cup red or white onion, diced  1 scallion, chopped  1 lime, juice of  3 tbsp extra virgin olive oil  1 tbsp cilantro, chopped  salt and fresh ground pepper  Mexican chili powder, a few pinches
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