01 - Bring a large pot of salted water to a boil and cook pasta according to package directions until al dente. Drain, rinse under cold water to halt cooking, and set aside to cool completely.
02 - Heat a grill or cast-iron skillet over high heat. If using fresh ears, grill the corn until lightly blackened and smoky, about 5–7 minutes, turning occasionally, then slice kernels from the cobs. If using frozen corn, thaw completely, then sear in the hot skillet until golden char marks appear.
03 - In a large mixing bowl, combine the cooled pasta, charred corn kernels, halved cherry tomatoes, diced red onion, chopped cilantro, and jalapeño (if using). Toss gently to distribute evenly.
04 - In a small bowl, whisk together the mayonnaise, sour cream (or Greek yogurt), lime juice, smoked paprika, chili powder, kosher salt, and black pepper until smooth and well blended.
05 - Pour the prepared dressing over the pasta and vegetable mixture. Fold gently with a large spoon or spatula until every component is evenly coated.
06 - Sprinkle the crumbled cotija cheese over the salad and fold it in gently, reserving a small amount for topping if desired.
07 - Transfer the salad to a serving bowl. Finish with additional chopped cilantro and lime wedges arranged alongside. Serve chilled or at room temperature.