Heat 2 teaspoons vegetable oill in a frying pan or curry pan over a medium heat. Add 1/2 small onion, sliced, 1/4 green pepper, sliced and 3 small button mushrooms, sliced. Stir-fry for 2 minutes.
Add 80 millilitres curry broth, 1 teaspoon garlic ginger paste, 1 teaspoon tomato puree, 1/4 teaspoon mild red chilli powder, 1 teaspoon dried fenugreek leaves (methi), pinch sea salt and 1 small handfull fresh coriander leaves, finely chopped. Bring to the boil. Add another 80 millilitres curry broth. Mix well and simmer for 2 minutes.
Add 9 cooked king prawns, the remaining 80 millilitres curry broth and 1 tablespoon single cream. Simmer for another 2 minutes until the jaipuri curry sauce is medium thick. Transfer the king prawn jaipuri curry to a serving bowl and finish with a little more fresh coriander. Serve with your favourite Indian rice and breads.