Step 1

In a large frying pan cook the ground beef over medium heat, stirring to break into small chunks. Cook until no longer pink,  about 5-7 minutes.

Step 2

Add in diced onion and sauté for another 2-3 minutes until onions are soft, then stir in garlic and onion powder, salt, and pepper.

Step 3

Transfer ground beef mixture to slow cooker and add tomato sauce, ketchup, white vinegar, brown sugar, and worcestershire sauce.

Step 4

Cook on low for 5 hours or high for 3 hours. Stir the mixture and serve beef spooned onto hamburger buns with a slice of cheddar cheese.