Prepare the Grill:Preheat your grill to medium-high heat. Lightly oil the grill grates to prevent sticking.
Grill the Peaches:Brush the cut sides of the peach halves with a little olive oil.Place the peaches cut-side down on the preheated grill. Grill for about 3-4 minutes until they have nice grill marks and are slightly softened.Remove from the grill and let cool slightly. Slice each half into wedges.
Make the Dressing:In a small bowl or a jar with a lid, combine the olive oil, balsamic vinegar, honey, Dijon mustard, salt, and pepper. Whisk or shake until well combined.
Assemble the Salad:In a large salad bowl, add the mixed greens. Top with the grilled peach wedges, fresh blueberries, crumbled feta cheese (if using), and toasted nuts.
Dress the Salad:Drizzle the dressing over the salad. Toss gently to combine, ensuring all the ingredients are evenly coated with the dressing.
Serve:Serve the salad immediately as a refreshing and delicious appetizer, side dish, or light lunch.