Method:

1. Wash, halve and roughly slice the zucchini. Heat 2 tablespoons of olive oil in a saucepan over medium heat. Add the zucchini and gently fry until the edges just start to turn golden, but without colouring completely. Season with salt and pepper and add 1⁄4 cup of water. Allow the liquid to evaporate while stirring and mashing the zucchini. When the liquid has evaporated, fry for about 1 minute.
2. Repeat with another 1⁄4 cup of water, stirring and mashing while the liquid evaporates then frying for a further minute or two. Repeat another three times. The idea is to slowly fry, steam and mash the zucchini five times all up, in order to enrich the flavour and break down the vegetables.
3. Add the garlic and chilli to the pan and cook for 1–2 minutes. Add the prawn meat and cook for about 5 minutes, stirring from time to time so the bottom doesn’t catch. Make sure you control the heat – if the mixture starts to colour, turn the heat down. Add the tomatoes and rosemary, season with salt and pepper, then repeat the slow-frying process for a further 5 minutes.
4. Bring a large saucepan of salted water to a fast boil and cook the pasta, following the packet instructions. Spaghetti should take about 10 minutes to cook.
5. Just before the pasta is cooked and ready to drain, add the remaining olive oil to the sauce. Drain the pasta, reserving a little cooking water, combine thoroughly with the sauce and serve.