Start by bringing a pot of water to a rolling boil. Add the fresh corn kernels and cook for about 5 to 7 minutes until they are tender yet crisp. Once done, drain the corn in a colander and allow it to cool completely.

In a large mixing bowl, add the cooled corn along with diced cucumber, halved cherry tomatoes, and chopped red onion. Use a spatula to gently fold the ingredients together.

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

Pour the prepared dressing over the vegetable mixture and toss gently to coat all the ingredients thoroughly.

Just before serving, sprinkle crumbled feta cheese and freshly chopped cilantro over the top of the salad. Serve immediately.