Heat oil in a saucepan, add the meat and saute until well browned. Add the onions, carrots, potatoes and the cooked beans and 1 cup water. Simmer on medium heat until the vegetables are tender about 30 minutes. Adding more water if necessary. Stir in the tomatoes, coriander, garlic, salt, pepper, tarragon and cumin. Bring to a boil. Reduce heat and simmer for another 30 minutes. Serve with rice