Fill a large pot with water and bring it to a rolling boil. Add fresh corn kernels and reduce heat slightly, letting them simmer for 5–7 minutes until tender yet crisp. Once cooked, drain the corn and set it aside to cool.

In a mixing bowl, combine the cooled corn, diced cucumber, halved cherry tomatoes, and finely chopped red onion. Fold the ingredients together gently.

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

Pour the dressing over the vegetable mixture, tossing gently to coat evenly. Let it sit for a few minutes.

Before serving, sprinkle crumbled feta and chopped cilantro on top for added flavor and texture.