For siput babi, you got to "purge" them 1st. Dunno what they eat before this. eg. pesticides, dog poo, toxic stuff. Better to just feed them cornmeal or kangkong for a week or 2. After that, before cook, got to starve them for 2 days. to "clean" them insides. Dun wanna bite into a bunch of poo.

After that just drop into boiling water and you will see foam forming on top. take out the foam and more foam will form. repeat until no more foam and their cooked!

Then you take them out of the shell and you can cook with anything you liek.