Combine the bell pepper, chiles, and cayenne pepper. Blend to a chunky paste.
Heat the palm oil in a pan. After about 5 minutes, add the blended pepper mixture to the hot oil. Season with salt and bouillon cubes to taste, and add any of the optional ingredients as desired.
Let cook over medium-low heat for about 30–40 minutes, until well-cooked and the oil is floating on top of the sauce.
Serve with ekuru.