Saute the onions, garlic, berbere, and paprika in the niter kebbeh for 2 minutes. Add the beans, carrots, and potatoes and continue to saute for about 10 minutes, stirring occasionally to prevent burning. Add the chopped tomatoes, tomato paste, and vegetable stock. Bring to a boil and then simmer for 15 minutes, or until all of the vegetables are tender. [personal comment: we simmered more like 40 minutes, until it eventually thickened.] Add salt and pepper to taste. Mix in the parsley (optional). Serve with injera and yogurt or cottage cheese.