Tyra buini! Artichoke is not Nepali food, so, simple khaire tarika: You normally eat it's heart only. Throw away all the "pattra pattra" pareko outside part, which is almost whole of what you buy as artichoke in supermarkets. And then you fry it for a few minutes in butter, add salt n pepper. This is the simplest, and I like it the best this way. More complicated way ma, you can make various kinds of sauce separately and add artichoke hearts into it.