Season chicken with kosher salt, freshly ground black pepper, add to a bowl with balsamic vinegar. Allow to marinate in the fridge for about 30 minutes
Meanwhile, prepare your salad. In a large bowl add your mixed greens, season with salt to taste. Add basil, cucumbers, red onion, pecans, and feta cheese.
Heat up your outdoor BBQ, and grill your peach halves, and balsamic marinated chicken until fully cooked. Allow to rest under a tent of foil.
Meanwhile, begin on your vinaigrette dressing, by combining all ingredients and whisk vigorously until fully emulsified. Slice chicken and peaches, add to your salad.