Adapted from simplyrecipes.com
Get a large pot of water boiling and add a generous pinch of salt. Boil the sweet potatoes for 5-10 minutes, or until they are not longer crunchy; you will finish cooking them in a moment. Drain and set aside. Mix the remaining ingredients in a shallow, wide sauté pan and bring to a boil. Add the sweet potatoes and coat well with the sauce. Boil on high heat until the sauce reduces to a syrup, about 10 minutes. Serve hot.