In pot combine beans and seasoning and cook until piping hot. Mash the beans in the pot with potato masher. Heat a little butter and a little margarine in skillet large enough to fit your tortilla. Spread beans on tortilla and place in skillet, put cheese on top and place another tortilla on top. Let bottom brown and flip over until cheese is melted. Take out of skillet and continue this until all beans are gone. Cut into 4 triangles and serve with salsa.