I have always appreciated clamshell quilts but a whole quilt seemed a little too ambitious. Making a pillow is a great way to try out something new and still get it finished in a reasonable amount of time.
I had a charm pack of Malka Dubrawsky's Simple Marks so the 5" square became my starting point. I drew a cardboard template, traced around it on the back of the fabric and cut out the shells with a seam allowance. Then I used aluminum foil to iron the piece around the template, which gave me the precise curved shapes that I needed for the pillow top. They were hand stitched together and then hand quilted with Perle cotton and embroidery floss. The rest of the finishing was by machine.