In a medium bowl, whisk together mayonnaise, sour cream, lime juice and taco seasoning until combined. Refrigerate until ready to use.
Combine all other ingredients (coleslaw mix, bell peppers, black beans, corn, cilantro and jalapeño) in a large bowl.
Toss with taco seasoning mixture until everything is thoroughly coated, then top with more cilantro, if desired. Enjoy!
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