You can use any combination of vegetables for this dish - look at what is in season, they will be cheaper and really taste good, and this recipe is so quick.
Heat 1 tablespoon of the olive oil in a saucepan and gently fry the garlic and onion for about 5 minutes. Add the other 2 tablespoons of oil, along with the peppers, courgettes and aubergine and continue to cook over a moderate heat for 5 minutes.
Add the canned tomatoes, tomato puree and herbs. Pour in the water, reduce the heat and simmer, stirring occasionally for another 25- 30 minutes.
Meanwhile in a large saucepan of boiling water, cook the pasta for 10 minutes or until tender. Drain, then mix with the vegetables. Warm through and serve
Remember, if you use different vegetables the cooking time of those vegetables will change from above.