Step 1: Cook the Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook according to package directions until al dente. Drain the pasta and rinse with cold water to stop the cooking process. Set aside.
Step 2: Char the Corn: Preheat a grill or grill pan to medium-high heat. Grill the corn, turning occasionally, until kernels are lightly charred on all sides, about 8-10 minutes. Alternatively, roast the corn in a preheated oven at 400F (200C) for 15-20 minutes, turning halfway through. Once cooled slightly, cut the kernels off the cob using a sharp knife.
Step 3: Prepare the Dressing: In a large bowl, whisk together the mayonnaise, sour cream (or Greek yogurt), cotija cheese, cilantro, lime juice, chili powder, smoked paprika, garlic powder, salt, and black pepper. Add minced jalapeo, if desired.
Step 4: Combine Ingredients: Add the cooked pasta and charred corn kernels to the bowl with the dressing. Toss gently to combine, ensuring that the pasta and corn are evenly coated.
Step 5: Chill and Serve: Cover the bowl and refrigerate the pasta salad for at least 30 minutes to allow the flavors to meld. Before serving, taste and adjust seasonings as needed, adding more lime juice, salt, or chili powder to your preference. Garnish with additional crumbled cotija cheese and chopped cilantro. Serve chilled.
Optional Tips and Substitutions: For a vegan version, substitute vegan mayonnaise and plant-based sour cream. Nutritional yeast can mimic the cheesy flavor of cotija. Add grilled bell peppers or black beans for extra heartiness and flavor. For a spicier kick, leave the seeds in the minced jalapeo or add a pinch of cayenne pepper to the dressing.