01 - Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Drain and rinse under cold water. Set aside.
02 - Heat a grill pan or skillet over medium-high heat. Add the corn kernels and cook, stirring occasionally, until lightly charred, about 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 cooled pasta, charred corn, diced red bell pepper, chopped red onion, jalapeño if using, and half of the chopped cilantro to the bowl with the dressing. Toss thoroughly to evenly coat all ingredients.
05 - Fold in most of the cotija cheese, reserving a small amount for garnish. Transfer to a serving dish. Sprinkle with remaining cheese and cilantro. Serve chilled or at room temperature.