Prepare grill for medium-high heat.
Brush corn with oil, sprinkle with kosher salt and chili powder. Place the corn on the grill, cook, turning often, until it is tender and charred in spots, 6-8 minutes total. Transfer to a cutting board and let cool, then cut kernels from cobs.
4 ears corn, ½ tsp salt, 1 tsp chili powder, 1 tbsp vegetable oil
Make the Dressing: In a medium bowl, mix all the ingredients together using a whisk. Set aside.
2 tbsp tahini, 2 tsp hot sauce, 3 tbsp lemon juice, 3 tbsp water, ¼ cup olive oil, 1 small shallot
In a large mixing bowl, toss together the corn kernels and nectarine slices/pieces. Drizzle with half of the dressing and gently toss. Fold the herbs and cheese through the salad.
2 nectarines, 1/4 cup basil, 2 tbsp mint, ½ cup feta cheese
Place the salad on a platter and drizzle with the remaining dressing.