You can't beat Claudia Roden - her technique for couscous is great, so I am shamelessly pasting her recipe. If you do want hot couscous, stick it in a hot oven, covered with foil for about 20 mins after you've soaked, left and fluffed it up.
Couscous salad
This substantial salad is easy to make for a large company and can be prepared in advance, as it does not spoil. The couscous does not need cooking, only soaking in water until it is tender.
serves 6-8
preparation time: 30 minutes, plus about 50 minutes standing
250g couscous
300ml cold water
juice of 1or 1,5 lemons, or to taste
6 tbsps extra-virgin olive oil
grated zest of 1 lemon (optional)
3 firm, medium-sized tomatoes, diced
1 cucumber, peeled and diced
8 spring onions, sliced
4 tbsps chopped fresh parsley a few sprigs of fresh mint, chopped
12 black or green olives, pitted and chopped (optional)
salt and pepper
Put the couscous in a bowl, add the water and stir well. Leave to stand for about 20 minutes, or until the water has been absorbed. Fluff the couscous up by rubbing it between your hands and break up any lumps.
For the dressing, mix together the lemon juice and extra-virgin olive oil with some salt and pepper and add the lemon zest, if you like. Stir into the couscous and leave to stand for at least 30 minutes, until it has absorbed the dressing.
Just before serving, add the tomatoes, cucumber, spring onions, parsley, mint and olives, and mix well.