Cook the pasta according to the instructions on the packaging then drain and keep warm.
Roughly chop the vegetables and thinly slice the garlic.
Heat the oil in a large, lidded pan then add the carrot , leek, courgette and garlic. Gently sauté under cover for about 5 minutes, until tender. Add the spices and stir for a minute until fragrant. Then add the tomato purée and pour in a glass of water. Add the stock powder or cube and cook for about 10 minutes until the sauce starts becoming thick.
Add the prawns and cook for about 3-5 minutes (under cover).
Then add the spinach or kale, put the lid on and after a minute turn off the heat. Rest for 5 minutes until the spinach is wilted and the prawns are pink all over.
Finally mix in the drained pasta, stir and warm through. Season to taste.
Serve it with extra chilli flakes if it's not spicy enough for your taste.