1) Mix black beans, frozen corn, and fruit salsa together in a medium bowl. Squeeze limes and set aside. Add avocado to salad, and before mixing, immediately add lime juice, red onion and salt to salad. Gently mix all ingredients together. Feel free to give this salad a little kick with some hot pepper flakes or hot sauce. A freshly diced jalapeño pepper tastes great too. Add cilantro prior to serving.