In a large skillet add your ground beef and thinly sliced onion.
2 pounds lean ground beef, 1 large onion
Saute over medium heat until the beef is cooked through.
Drain any grease and add the meat and onion mix to your slow cooker.
1 once onion soup mix
To the slow cooker add the oatmeal, beef broth, beefy onion soup mix, worcheshire sauce, garlic powder and black pepper.
½ cup quick cooking oatmeal, 1 1/3 cups beef broth, 1 Tablespoon Worcestershire Sauce, ½ teaspoon garlic powder, ½ teaspoon black pepper
Stir to combine.
Cover and cook on low for 3-4 hours.
Right before serving place the slices of provolone cheese on top and cover for 5 minutes until the cheese is melty.
6 slices provolone cheese
Serve on brioche buns or slider buns.
6 buns