Preheat your grill to medium-high heat. Clean grill well. Slice chicken (you can use boneless skinless thighs or breasts) into thin, 2-inch strips. Add chicken to a bowl with olive oil, chili powder, garlic powder, oregano, salt and pepper. Stir well to combine.
Slice peaches into quarters or thirds. You want pretty big chunks so they don’t fall apart on the grill. Also cut peppers and onions into large chunks.
Skewer chicken with peaches, onions, and peppers. When your skewer is done, add a second skewer going the opposite direction. This will keep the ingredients in place on the grill and make them easier to flip. Drizzle finished skewers with olive oil and sprinkle with salt and pepper.
Grill kabobs for about 15-20 minutes, turning occasionally, until chicken is cooked through and peaches and peppers are charred in spots.
Remove kabobs and sprinkle with chives. Serve kabobs with steamed rice or in a pita as a sandwich.