In a medium mixing bowl, whisk together the mayo or Greek yogurt, fresh lime juice, chili powder, garlic powder, cumin, paprika, and a pinch of salt until smooth and creamy.

In a large mixing bowl, combine the cooked shredded chicken, rinsed black beans, drained sweet corn, diced jalapeño, quartered cherry tomatoes, chopped red onion, and pepitas. Gently toss until well mixed.

Pour the prepared dressing over the combined ingredients and carefully fold until every piece is evenly coated.

Transfer the salad to a serving bowl or plate it onto fresh lettuce leaves. Serve immediately, adding additional pepitas on top if desired.