Get a 2nd hand multicooker off eBay. They slow cook, do rice/lentils/soups and lots of other things. I got one that was a bit bashed about but worked perfectly for £20.
Grow herbs either inside or outside. Rosemary, Thyme, Bay and garlic and a few others will grow fine. For the rest, get dry. Herbs add instant flavour to rice, lentils etc.
A small chicken (about £4) equals 4 meals. When the carcass is stripped, put it in your multicooker, just cover with cold water, add a whole carrot, a whole onion, both halved, some peppercorns, 3 or 4 bay leaves and 2 teaspoons salt. Slow cook on a very low heat for 6 hours. Get rid of all the solids and you now have chicken stock.