In a large pot, bring salted water to a boil. Add the pasta and cook according to package instructions until al dente. Drain and rinse under cold water to cool.
If using fresh corn, grill the corn on medium-high heat for about 10 minutes, turning occasionally, until char marks appear. Let cool, then cut the kernels off the cob. If using frozen corn, thaw and lightly sauté in a pan for 2-3 minutes until heated through.
In a large bowl, combine the cooled pasta, corn, diced red bell pepper, and chopped red onion.
In a small bowl, whisk together lime juice, olive oil, smoked paprika, chili powder, salt, and pepper until blended.
Pour the dressing over the pasta mixture and toss gently until everything is evenly coated.
Fold in the crumbled feta cheese and chopped cilantro, mixing gently.
For an optional kick, add sliced jalapeños to the salad. Serve immediately or refrigerate for about 30 minutes to let flavors meld.
Notes
Serve chilled for best flavor. Garnish with extra cilantro and feta.