In a small bowl, whisk together the mayonnaise, sour cream, lime juice, and taco seasoning until fully blended.

In a large mixing bowl, toss together the tri-color coleslaw mix, diced red bell pepper, halved grape tomatoes, drained black beans, grilled corn, minced jalapeño, and chopped cilantro until everything is evenly distributed.

Pour the dressing over the vegetable mixture and gently fold everything together until all components are thoroughly coated.

Adjust the seasoning with salt and freshly ground black pepper to taste.

Cover the coleslaw and refrigerate for at least 30 minutes to develop and meld the flavors before serving.