If you like your Rogan Josh with a kick of heat, this spicy version is sure to satisfy your taste buds. Using a food processor, blend together onions, garlic, ginger, and a combination of spicy peppers to create a fiery paste. The paste is then cooked with tender pieces of lamb, tomatoes, and yogurt until the meat is tender and the flavors have developed. The addition of extra spices like cayenne pepper and red chili flakes adds an extra level of heat to this spicy Rogan Josh. Serve it with cooling raita and naan bread to balance out the spiciness.