01 - Bring a large pot of salted water to a boil. Cook pasta according to package directions until al dente. Drain in a colander and rinse under cold running water to halt cooking. Set aside to drain completely.
02 - Heat a large skillet or grill pan over medium-high heat. Spread corn kernels in an even single layer and cook undisturbed for 3–4 minutes until lightly charred. Stir and continue cooking 2 additional minutes. Remove from heat and allow to cool.
03 - In a large salad bowl, combine the cooled pasta, charred corn, quartered cherry tomatoes, diced red onion, chopped jalapeño (if using), and cilantro. Toss gently to distribute evenly.
04 - In a small mixing bowl, whisk together mayonnaise, sour cream, lime juice, chili powder, smoked paprika, garlic powder, salt, and pepper until smooth and well blended.
05 - Pour the prepared dressing over the salad ingredients. Fold gently with a large spoon or spatula until all components are evenly coated.
06 - Fold crumbled cotija cheese into the salad. Taste and adjust salt, pepper, or chili powder as desired.
07 - Transfer to a serving bowl and garnish with additional cilantro and crumbled cotija cheese. Serve chilled or at room temperature.