Make the marinade by mixing all the ingredients in a bowl. Save a third cup of it for later.
Chop the chicken breast into bite-sized pieces, about 1 1/2-inch. Soak in the marinade for at least 4 hours (best if done overnight).
Chop the red onion and bell peppers into bite-sized pieces, about the same size as the chicken.
Pre-heat your oven at 375 degrees Fahrenheit and prepare your baking pan. Cover it with foil for easy clean-up. Lightly brush the pan with olive oil.
Alternately thread the bell peppers, onion, and chicken into the skewers. Transfer to the baking pan. Brush the kabobs with a little bit of olive oil and roast for 10 minutes.
While waiting for the kabobs to get cooked, thicken your saved marinade in a saucepan. Set aside.
After the 10-minute cooking time is up, baste the skewers with the prepared sauce. Put back in the oven and broil for 3-5 minutes until you achieve the desired charred look.
Check the chicken's internal temperature, making sure that it's 165 degrees Fahrenheit.
Brush the chicken kabobs with the sauce before serving.