Begin by bringing a large pot of salted water to a boil. Add fresh corn kernels and cook for 5 to 7 minutes until tender. Once done, drain the corn and spread it out on a plate to cool completely.

In a spacious mixing bowl, combine the cooled corn with diced cucumber, halved cherry tomatoes, and finely chopped red onion. Gently toss the ingredients together.

In a separate bowl, whisk together mayonnaise, sour cream, lime juice, chili powder, salt, and pepper until smooth and creamy.

Pour the prepared dressing over the vegetable mixture in the large bowl. Using a spatula, gently toss the salad until every piece is well-coated with the dressing.

To finish, sprinkle crumbled feta cheese and chopped cilantro on top of the salad. Serve immediately for the freshest taste.