- Prepare a grill for medium heat. Brush the corn and sliced peaches with oil, season with salt.
- Grill corn, turning occasionally, until corn is charred, 10–12 minutes for corn. Peaches should take 7 minutes (3.5 mins on each side). Transfer to a platter and let cool slightly before shucking corn.
- Cut the kernels from the cobb in a bowl. Roughly chop the grilled peaches leaving 2 to place on top.
- Dressing: Add all the ingredients to a small dish, combine. Toss and coat the corn/peach mixture and red onion, in the dressing. Garnish with additional salt, grilled peaches and basil.