Slow Cooker Ground Beef Barbecue

Details

Ingredients

• 3 pounds lean ground beef
• 1 large onion, chopped
• 2 cloves garlic, minced
• 5 stalks celery, finely chopped
• 1 ½ teaspoons salt
• ½ teaspoon ground black pepper
• 1 tablespoon cider vinegar
• 2 tablespoons prepared mustard
• ¼ cup firmly packed brown sugar
• 3 ½ cups ketchup