Grilled Chicken & Peaches

1 Tbsp. white wine vinegar
1/2 tsp. grated fresh ginger
3 Tbsp. plus 1 tsp. olive oil
kosher salt  & pepper
2 medium red onions, sliced into 1/2 inch thick rounds
4 boneless, skinless chicken breasts
3 peaches, cut into wedges
1 bunch spinach, thick stems removed or baby spinach (about 4 C.)

Heat grill to medium-high. In a small bowl, whisk together the vinegar, ginger, 1 Tbsp. of the oil, and 1/8 tsp. each salt & pepper; set aside.
Brush the onions with 1 Tbsp. of the oil and season with 1/4 tsp. each salt and pepper. Brush the chicken with 1tsp. of the oil, and season with 1/2 tsp. each salt and pepper. In a bowl, toss the peaches with the remaining oil.
Grill the chicken and onions until the chicken is cooked through and the onions are tender, 5-6 min. per side. Grill the peaches (reserve the bowl) until charred, 2 min. per side.
Transfer the peaches and onions to the bowl. Add the spinach and vinaigrette and toss to combine. Serve with the chicken.

Helpful Tip: You can turn this dish into a sandwich by slicing the chicken, then layering it with peaches, onions, and spinach on your favorite sandwich bread or bun. You can also make it into a wrap or stuff it into a pita.