A friend of mine gave me a slow cooker and I was so keen to it try it out that I basically just browned off some cubes of stewing steak, added them to the slow cooker with a diced onion and poured over a few tins of chopped tomatoes. Six hours later, we sat down to the most tender beef stew I've eaten in a long time! See my tip for leftovers (if you have any)!
Add beans or other vegetables to bulk it up.
Add fresh thyme or basil leaves at the end of cooking.
If it's too much for one dinner, you can make a pie using any leftovers: Place in a casserole dish, cover with mashed potatoes and some grated cheese and reheat in the oven for 20 to 30 minutes.