I fried my panisses in olive oil, as is traditional, in my cast iron skillet and it's a little hard to tell you exactly how much to use but you want enough so that the panisses won't stick. This makes about 36 panisses. A commenter a while back noted they grilled them, which is likely possible. We can't grill in Paris as it's not authorized (I think it's because they are worried about fires), but if you want to give it a go, you can likely brush them with olive oil and cook them that way. If you do, let us know how they come out in the comments.