01 - Bring a large pot of salted water to a boil. Cook the pasta according to package directions until al dente. Drain in a colander and rinse thoroughly under cold water to halt 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 3-4 minutes until lightly charred in spots. Stir and continue cooking for 2 more minutes. Remove from heat and allow to cool.
03 - In a small bowl, whisk together the mayonnaise, sour cream, fresh lime juice, chili powder, smoked paprika, garlic powder, salt, and black pepper until smooth and well combined.
04 - In a large salad bowl, combine the cooled pasta, charred corn, quartered cherry tomatoes, diced red onion, jalapeño if using, and chopped cilantro. Toss gently to distribute evenly.
05 - Pour the prepared dressing over the salad and toss gently until all ingredients are evenly coated. Fold in the crumbled cotija cheese. Taste and adjust seasoning as needed.
06 - Transfer to a serving bowl and garnish with additional cilantro and crumbled cotija cheese if desired. Serve chilled or at room temperature.