1 lb. lean ground beef
2 tablespoons olive oil
1 small yellow onion, finely diced
1 small green pepper, seeded and finely diced
1 clove garlic, finely diced
1 cup ketchup
2 tablespoons mustard
1 tablespoon apple cider vinegar
1 teaspoon Agave nectar
1 teaspoon paprika
1/2 teaspoon ground cloves
kosher salt, to taste
1/2 teaspoon freshly ground black pepper
1/2 teaspoon Cayenne pepper

Heat the olive oil in a large skillet over medium heat. Add onion, pepper, and celery. Cook for about 10 minutes. Add garlic and cook another 3 minutes. Add the ground beef and cook for about 8 minutes or until browned. Add the ketchup, mustard, vinegar, Agave nectar, paprika and ground cloves, then cook over medium-low heat, stirring frequently. About 30 minutes later, season with salt, black pepper and cayenne pepper. Serve on rolls.