In soup pot, saute onions in 2 tablespoon. broth until softened. In blender or food processor, combine tomatoes with their juice, spices and cliantro. Puree until fairly smooth. Add to onions. Simmer covered 5 minutes. Add lentils, wheat berries and broth or water. Cover tightly. If using crockpot, set on medieum heat 8-10 hours, or low heat overnight. On stove, simmer until wheat is tender, about 1- half hours. About 15 minutes before serving, add garbanzos. About 10 minutes before serving, beat egg with juice of one lemon. Reduce heat to simmer; stir egg mixture into soup until forms strands. Season with salt and pepper. To serve, squeeze juice of remaining lemon into soup bowls before ladling in soup.