While softer peaches are a bit more prevalent at this time, you'll want to try and find a firmer peach for the grill (or in my case, grill pan.)
Grilled Peach Salad (serves 4)
Bring vinegar to a boil in a small saucepan over medium-high heat. Reduce heat, and simmer until vinegar is reduced to 2 tablespoons (about 2 minutes). Remove from heat; stir in honey. Cool to room temperature.
Prepare grill to high heat. I used a grill pan because sadly (tear) I have no grill. Place peach wedges on grill rack coated with cooking spray; grill 30 seconds on each side or until grill marks appear but peaches are still firm. Remove from grill; set aside.
Combine oil, pepper, and salt in a large bowl, stirring with a whisk. Add arugula, tossing gently to coat. Arrange arugula mixture on a platter. Top with peach wedges and prosciutto. Drizzle with balsamic glaze; sprinkle with cheese.