Pre heat the grill to medium high. Combine the cooked rice with the vegetables, seasonings, pinch of salt & pepper and a drizzle of olive oil. Stuff the peppers with the rice mixture. Lay out a large rectangle of aluminum foil, place pepper in the middle. Drizzle with Olive oil. Wrap loosely. Place the peppers on the grill and cook for 5 minutes. Flip and cook for another 5 mins.
Reduce heat to low and allow to cook for an additional 10 minutes. Be very careful when opening, the steam is extremely hot.