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