Tomato and basil couscous

This is really simple, and, best of all, it only takes about 10 minutes to prepare. You can make it as a salad, but we usually eat it as a whole meal.

6-8 roma tomatoes, cut into rounds (or a punnet of cherry tomatoes, whole)
1 bunch basil, chopped
2 cloves garlic, finely chopped or crushed
1 small red onion, sliced into strips
1 1/2 cups couscous
1 1/2 cups stock
2 tablespoons balsamic vinegar
salt & pepper

Cook the onion and garlic very lightly in a large shallow pan. Add the tomatoes. After a few minutes (when the are just starting to get soft, not cooked), remove from heat and sprinkle couscous over the top. Pour over stock, cover. Allow to stand for ~3 mins, Or until all the stock is absorbed. Add the basil and balsamic vinegar. Add salt and pepper to taste. Stir through. Serve warm or cold. (It's quite nice with a bit of grated parmesan cheese, too, once it's cooled down).
(serves 2-3 as a main dish)