Potting up some basil seedlings I end up with far too many. 
Some are ordinary "sweet" basil and some are Thai basil (variety Siam Queen) which has a more liquorice flavour - but you can use it in the same way.  Thai basil has pretty pink/purple flowers if you let it (sorry I can't find photos) - better to eat the tops from time to time to keep it making leaves as long as you can, but eventually it will flower regardless. 
Basil likes strong sunlight and warmth, so probably keep inside in a bright kitchen window or conservatory.  They're very happy outside in pots in summer, but in my experience get immediately eaten by slugs if I plant them in the ground so probably don't do that! 
These are only just potted up in fresh compost in individual pots, so you can just water them (and eat them) for a while. In some weeks they will outgrow their small pots and then you should pot them on.  You can keep them going all summer, but they are tender annual so don't expect them to live forever. 
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 - Free: Foxgloves (Hatfield AL10)Promised 64d
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