Step 1

Heat 1 tablespoon oil in a large skillet over medium-high heat. Add 1/3 of the beef, 1/2 cup onion, and 1 clove garlic. Season with salt and pepper. Cook until browned and crumbly, 5 to 7 minutes. Transfer to a slow cooker. Repeat twice more with remaining oil, beef, onion, garlic, salt, and pepper.

Step 2

Add Sloppy Joe sauce, celery, green pepper, brown sugar, cider vinegar, and cloves to the slow cooker. Cook on Low for at least 4 hours, adjusting seasoning to taste.