Start to fry: Heat the olive oil in a large saucepan over a medium high heat and fry the onion for a few minutes until starting to soften.
In go the veggies: Add the aubergine, courgettes, peppers and garlic to the pan and cook for 10 minutes until turning golden on the edges.
Sauce and simmer: Add the tomato puree, tinned tomatoes, dried thyme, vinegar, sugar and basil stems and simmer everything together for 15-20 minutes until thickened. Taste and season with salt and pepper.
Dish up: Serve with the basil leaves and some crusty bread.
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