These Slow Cooker Sloppy Joe sandwiches are scrumptious, tangy, sweet, hearty, and satisfying and will take you back to your childhood. One thing I like is that I always have every ingredient on hand for the meat filling. Another is it makes enough for our dinner and then lunch or dinner the next day. I think the BEST feature of these retro sandwiches is that you make them in crockpot!