01 - In a large pot of salted boiling water, cook pasta according to package directions until al dente. Drain and rinse under cold water to halt cooking. Set aside.
02 - Heat a grill pan or skillet over medium-high heat. Add corn kernels and cook, stirring occasionally, until lightly charred, about 5 to 7 minutes. Remove from heat to cool.
03 - In a large mixing bowl, whisk together mayonnaise, sour cream, lime juice, chili powder, paprika, garlic powder, salt, and black pepper until fully combined.
04 - Add cooled pasta, charred corn, diced red bell pepper, chopped red onion, minced jalapeño if using, and half the chopped cilantro to the dressing. Toss gently until all ingredients are evenly coated.
05 - Fold in most of the cotija cheese, reserving a small amount for garnish.
06 - Transfer salad to a serving dish, topping with remaining cotija cheese and cilantro. Serve chilled or at room temperature as desired.