You really don't need a can of Manwhich or a packet of Sloppy Joe mix to make excellent Sloppy Joes! Honest. And here's how you do it.
Chop up about half an onion into fine pieces. Brown in a tablespoon or so of veg/sunflower oil with a bit of garlic. Add some ground mince. Brown. Drain off oil/water. Now add enough ragu type sauce until it's the consistancy you want. Add some American mustard(a squirt), some ketchup(another squirt) and some lovely Worcester sauce(a dash). Mix it all up. Simmer till it's all nice and hot. Put it on your rolls. Voila! Sloppy Joes without a mix.