Next cut out your shape, I use templates so that I get the same shape every time. With my slab roller I can do lots of pieces at once. Right now I am showing you what to do with the long skinny oval in the front of the photo.
Move your cut out pieces to a canvas and smooth them with a wet sponge. Next take one end of the oval and pinch it together and roll it towards you. Pinch the other side and roll it in the opposite direction. Now you will have a boat shaped dish. You can leave it plain or you can use your fingers to flute the edges like I do. You might want to click on this photo to enlarge it so you can really see how it's done.