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 or grill pan, turning occasionally, until kernels are lightly blackened and smoky, about 5 to 7 minutes. Cut kernels off the cob. If using frozen corn, thaw completely and pan-sear in a hot skillet until lightly charred.
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 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 toss gently until every component 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 arrange lime wedges alongside. Serve chilled or at room temperature.