Combine chili pepper, garlic, juice of 1 lemon, EVOO and paprika in a plastic food storage bag and add chicken. Marinate for 1 hour then skewer on metal rods with onions and sweet peppers.
Preheat grill or grill pan to medium-high heat.
Boil sweet potatoes for 7 minutes in salted water to partially cook them. Drain and cool to handle. Season the potatoes with salt and pepper. Wrap 12 slices of sweet potato in bacon and skewer, layering every other potato with bacon wrapped slices. Skewer the potatoes so that as much surface area is exposed as possible. Dress the potato kabobs with oil or spray with cooking spray and season with salt and pepper.