01 - In a large pot, cook the pasta in salted boiling water following the package instructions until al dente. Drain, rinse with cold water to halt cooking, and set aside.
02 - Heat a grill pan or skillet over medium-high. Add the corn kernels and cook, stirring occasionally, until lightly charred, 5 to 7 minutes. Remove from heat and allow 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 smooth.
04 - Add the cooled pasta, charred corn, red bell pepper, red onion, jalapeño if using, and half the fresh cilantro to the bowl with dressing. Toss until vegetables and pasta are evenly coated.
05 - Gently fold in most of the cotija cheese, reserving a portion for final garnish.
06 - Transfer salad to a serving dish, sprinkle with remaining cotija cheese and fresh cilantro. Serve chilled or at room temperature.