01 - Bring a large pot of salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Drain through a colander and rinse thoroughly 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 the corn kernels in an even single layer and let them cook undisturbed for 3 to 4 minutes until lightly charred on the bottom. Stir and continue cooking for another 2 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.
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 completely smooth and well blended.
05 - Pour the prepared dressing over the salad ingredients. Gently toss everything together until all components are evenly coated.
06 - Fold the crumbled cotija cheese into the salad. 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.