take a cake baking pan. make a thick layer with biscuits crumbs by slightly pressing with your hand.
then, make custard as per instructions on pkg. while making it mix half pack of jelly powder in it. after making custard, cool it for few minutes then pour over the biscuit layer. place the baking pan in freezer till it gets semi-solid.
meanwhile make the remaining jelly as per instructions on pkg. let it cool and pour it over the semi-solid custard and freeze. take it out of freezer right before serving.