Begin by draining and rinsing the black beans and corn.
In a large bowl, combine the black beans, corn, diced onion, diced tomatoes, chopped cilantro, and diced jalapeno.
In a separate small bowl, whisk together the mayo, lime juice, cumin, salt, and pepper to create the dressing.
Pour the dressing over the bean and corn mixture.
Mix everything together until well combined, using either a blender or a spoon.
Serve the salad as a refreshing dish or as a dip.
