HEAT a medium saucepan over medium. Add oil, then onion. Cook until onion is soft, about 4 min. Stir in molasses, maple syrup, tomato paste, Dijon, salt and chipotle pepper powder. Add beans and water. Boil, then reduce heat to medium-low. Simmer, covered, until beans are brown and sauce is thickened, 25 to 30 min.