01 - Bring a large pot of salted water to a boil. Cook pasta according to package directions until al dente. Drain, rinse under cold water to halt cooking, and set aside to cool completely.
02 - If using fresh corn, grill or sear ears on a hot skillet until lightly blackened spots appear, about 5–7 minutes, turning occasionally. Cut kernels off the cob. If using frozen corn, thaw and pan-sear in a hot skillet until lightly charred for smoky flavor.
03 - In a large mixing bowl, toss together the cooled pasta, charred corn kernels, halved cherry tomatoes, diced red onion, chopped cilantro, and jalapeño if using.
04 - In a small bowl, whisk together 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 dressing over the pasta mixture and gently toss until everything is evenly coated.
06 - Fold in the crumbled cotija cheese, reserving a small amount for garnish if desired.
07 - Transfer to a serving bowl. Top with additional chopped cilantro and lime wedges. Serve chilled or at room temperature.