Crock Pot Sloppy Joes

Bahan-bahan (10 porsi)

• 2 pounds ground beef
• 1 large onion (chopped)
• 4 cloves garlic (minced)
• 1 cup ketchup
• ⅓ cup chili sauce
• 1 ½ cups diced green bell pepper
• 1 cup chopped celery
• 1 ½ tablespoons brown sugar
• 2 tablespoons tomato paste
• 3 tablespoons yellow mustard
• 2 tablespoons apple cider vinegar
• 3 tablespoons Worcestershire sauce
• 1 tablespoon chili powder
• rolls (or buns, for serving )