01 - Preheat the grill to medium-high heat, approximately 400°F.
02 - Combine softened butter, minced garlic, chopped parsley, kosher salt, and black pepper in a small bowl, mixing until uniform.
03 - Optionally brush the corn lightly with olive oil to prevent sticking during grilling.
04 - Place corn on the grill and cook, turning every 2 to 3 minutes, until kernels are tender and lightly charred, about 10 to 12 minutes.
05 - Remove corn from the grill and immediately coat each ear generously with the garlic butter mixture.
06 - If desired, sprinkle with grated Parmesan and chopped chives, then serve with lemon wedges.