Clean the chicken wings thoroughly.
Season with salt and pepper.
Heat oil in a pan, grill the chicken wings on both sides, then remove them.
Add onions and garlic to the pan, sauté, then return the chicken wings to the pan.
Add gochujang (Korean chili paste), soy sauce, sugar, mirin, and water, then simmer over medium-low heat.
When the sauce is well absorbed and thickens around the wings, turn off the heat.
Plate and garnish with basil leaves to finish.