Things like braising steak or neck of lamb ate great. You can skip the browning the meat if you don't have time.
Just stick meat, chopped up inion, some garlic cloves and some chunks of veg in a pot (stove top or oven depending on preferences and what you own).
Add liquid and herbs of choice and cook slowly for 2-3 hours.
I don't have a slow cooker but might be worth considering?
Suggestions:
Lamb, pearl barley, swede and stock
Lamb, split peas, spices, tinned tomatoes and you have a curry
Beef, carrots, caraway seeds and red wine
Beef, swede, beer (any ale from golden to stout)
If you stick more veg in you can serve as it is with bread if you're stuck, or just do some rice or spuds.