In a bowl mix together prawns, chilli and oyster sauce.

Cut filo pastry into 4 inch squares. Place a heaped teaspoon of prawn filling in the centre of each square, draw the corners of the pastry together and twist to form little bundles. Place on a floured serving plate and chill until required.

To make sauce, pour tomato sauce, chilli sauce, 2 tablespoons water and sesame oil into a saucepan and heat gently for 3-4 minutes. Serve hot with the prawn bundles cooked in hot oil.