In a large skillet, brownthe ground beef with the diced onion and minced garlic.
When the meat is almostdone, add in the grated sweet potatoes, adobo seasoning and oregano. Add saltand pepper to taste. Cook until the meat is done and the sweet potatoes aretender.
Fill each mushroom cap with the meat mixture and place in a shallow baking dish.
Bake for 15 - 18 minutes,or until the mushrooms have softened, and the meat mixture has browned on top.
Notes
If you don't happen to have 80 pounds of ground beef in your freezer, ground pork or turkey would also work well.