Preheat grill for medium heat & lightly oil grate. Season chicken with salt & pepper. Stir Aloha From Oregon Peach Pepper Jelly, olive oil, soy sauce, garlic, & mustard in a bowl. Reserve about 1/2 a cup. Place chicken on grill; cook until golden brown, 6 to 7 minutes, then flip chicken. Continue cooking for 5 to 6 minutes. Brush both sides of chicken with peach sauce. Cook unti no longer pink in the center & juices run clear, 4 to 5 more minutes. Arrange peach halves cut side down on the grill. Grill for 2 minutes, flip, & brush with reserved 1/2 cup peach sauce. Continue to grill until peaches are tender, 3 to 4 minutes more. Serve peaches with chicken.