Salt, clove, nutmeg, and cinnamon should be rubbed to chicken breasts.
Combine peach preserves, lemon juice, and red pepper flakes in a stainless steel bowl.
Combine red and green peppers, peaches, mint, onion, and 2 tbsp of the glaze mixture in a separate stainless steel dish.
Use all of the leftover glaze mixture to coat the chicken.
Heat the grill to medium after gently oiling the grill rack.
For 7 minutes on each side, grill chicken over direct heat while it is covered.
For a further 7 minutes, turn the grill.
Serve with relish.