Heat some oil and add a lot of chopped garlic, then stir fry the beans. When they've cooked for a few minutes, add equal parts of soy sauce and brown sugar (start with 2 T of each). Also add a much cayenne as you can stand. Continue to cook till the beans are tender. If you want more sauce, add more soy sauce and sugar, or add less so it cooks down and sticks to the beans.