Drain and thoroughly rinse the black beans under cold water. If using fresh corn, carefully slice the kernels off the cob.
In a large serving bowl, combine the prepared black beans, corn kernels, halved cherry tomatoes, finely diced red onion, and chopped fresh cilantro.
In a separate small bowl or liquid measuring cup, whisk together the fresh lime juice, extra virgin olive oil, ground cumin, kosher salt, and black pepper until fully emulsified.
Pour the lime vinaigrette over the corn and black bean mixture. Gently toss the salad until all the vegetables are evenly coated with the dressing.
Cover the bowl and refrigerate for at least 30 minutes before serving to allow the flavors to meld together perfectly. Give it one final toss right before serving.