Heat oil in a large wok or frying pan over high heat. Add onions and stir fry for 2-3 minutes until starting to brown. Add prawns and continue stir frying until prawns change colour.
Add McCormick Chilli Ground, tomato paste and vegetable stock or water. Stir through for a further 1 – 2 minutes or until prawns are cooked through and coated in sauce.
Serve with a squeeze of lemon juice and a sprinkle of sliced chilli over cooked rice.