Grill corn & take off the cob.
Lightly oil & salt peaches. Grill for 30 seconds or until you have cross marks on flesh. Cut into wedges.
Cut red onions into wedges. Season wedges with oil and salt.
Grill on medium high heat on both sides, until onions are caramelized on both sides, approx 3 min on each side.
Place all vegetables into a bowl.
Mix thoroughly with 2 tablespoons of red wine vinegar, 3 tablespoons extra virgin olive oil, basil & salt to taste.