Vegan Sloppy Joes
You can use 1 pound steamed lentils (such as Melissa's(R) from the produce aisle at Trader Joe's(R)) in place of meatless grounds, if you like. Just add some vegan beef-flavored bouillon base (not stock, you wouldn't want to add extra liquid) and a pinch of garlic powder to give it a beefy flavor. This is a healthy and tasty soy-free alternative to grounds.
Sometimes I steam the hamburger buns on top of the filling mixture until it's finished cooking.