Its a bit naughty of Asda to do that really. They should give you the uncooked nutritional information. You dont get the cooking information on mince, do you? It just gives the raw information.
In fact, i might write to them and moan because i think its naughty. When i look at the backs of the packs, i expect to find the information of that item, not the nutritional information on how they suggest you cook it.