Mexican Grilled Corn

Name: Mexican Grilled Corn
Ingredients: 1/3 cup (about 1 1/2 ounces) grated Parmesan; 4 ears corn, husks and silk removed, cut in half; 1 tablespoon butter, room temperature; Coarse salt and ground pepper; 2 tablespoons light mayonnaise; 1/4 teaspoon chili powder, preferably chipotle; 1 lime, cut into wedges, for serving