Toss the peaches with olive oil then place them evenly on the grill grates over medium-high and cook for 2-3 minutes on both sides.
Add all of the dressing ingredients to a jar with a lid and shake well. You could also add them to a tall measuring glass and stir well with a small whisk or fork. Set the dressing aside.
Add the greens to a bowl and pour 1/2 of the dressing over and toss well to coat. Top with the rest of the ingredients, including the grilled peaches.
tDrizzle the other half of the dressing on top and serve right away or save the dressing and let guests dress their salad individually.