Finely chop the onion.
Roughly chop the carrots and tomato.
In a heavy-based sauce pan heat 1Tbsp vegetable oil and gently fry the onion and carrot until the onion has softened. Add the paprika and stir for a minute or so then pour in the stock. Add the tomatoes and red pepper.
Turn down the heat and cook for about 10 minutes until the sauce thickens. Add the peas. Bring to the simmer and add the prawns. Put the lid on and cook for 3-5 minutes until the prawns change colour. Season to taste.
Discard the pepper and tomato skins. Serve with chopped parsley and chilli, if you'd like it spicy.