Instructions

  1. Combine ketchup and next 8 ingredients (ketchup through hot sauce), set aside.
  2. Heat oil in Dutch oven over medium-high heat; add mushrooms and next 7 ingredients (mushrooms through ground round); saute 5 minutes until meat is browned, stirring to crumble.
  3. Stir in ketchup mixture; bring to a boil.
  4. Cover, reduce heat, and simmer 20 minutes, stirring occasionally.
  5. Serve on toasted hamburger buns.