Preheat your oven to 190°C. Combine bulgar wheat with the crumbled falafels, garlic, cherry tomatoes, coriander, parsley, lemon, sumac, salt and pepper. Press this mixture into the peppers and place on a lined baking sheet. Transfer to the oven to bake for 25 minutes. Meanwhile, to make the Muhamarra sauce, place all ingredients into a food processor and pulse until you have a rough paste. Serve the peppers with the Muhamarra sauce.