Heat a heavy based pan over a medium heat, and spritz liberally with low calorie cooking spray. Add the contents of sachet 1 from your Spicentice kit, and sizzle for a few seconds.
Add the onion and fry until lightly browned. Add the garlic and ginger, and continue to fry.
Add the tomatoes, contents of sachet 2 from your Spicentice kit, the salt, and the lemon juice. Stir well.
Add the coconut milk with 100ml cold water.
Add the prawns, stir, and simmer for 5-10 minutes on a low heat, until the prawns are cooked through and tender. Avoid overcooking so they don't become hard and chewy!
Check the seasoning, garnish with coriander, serve, and enjoy!