The serious answer, fuck me a serious answer in Off Top ! is seeds cost £2 a packet, you get hundreds, you sow a handful at a time and quite a few come up. As you thin them out you can take them and eat them, they are so much better than shop bought shit. I have 4 different varieties on the go and take them when I need them. Yes there is waste because some grow so well I (we) can't eat it whilst it is fresh. The left over leaves are simply put in the compost bin. Put some radish in, (the easiest thing to grow in the world) beetroot, dead easy, onions, tomatoes and some potato's and you have the basics.