First, cook your pasta according to packaging instructions. Depending on the type that you use, cooking time may vary. Drain your pasta and allow it to fully cool down. A helpful trick to stop the pasta from sticking together is to drizzle it with a small amount of oil.
Heat the olive oil in a pan over medium heat. Add the corn kernels and toss. Next, add garlic powder, chili powder, and tajin. Roast everything in the pan for 5 to 8 minutes, stirring constantly until slightly charred.
Meanwhile, combine the dressing ingredients in a small bowl or jar until smooth. Add macaroni to a mixing bowl, along with cooked corn, red onion, jalapeño, cilantro, and vegan feta.
Pour the dressing over the top, and toss. Store in the fridge for up to 3 days, or enjoy immediately.