I'd substitute dry berebere. In dry pan over moderate low heat, stir fry onion, garlic, and carrots for 2 mins. Add 1/2c of the water and cook 5 mins longer. Add the oil and continue to simmer. Add the tumeric, chilies, and cabbage. Cover the pan and steam to reduce the bulk for 2 mins. Stir well and add the quemam, tomato paste, salt and the potatoes. Cover the pan and cook for 5 mins. Add the remaining water and simmer for 5 minutes more to soften the potatoes and thicken the sauce somewhat. Serve at room temperature with Injeera. ++++-