Recently I was asked how to make lentils out of polymer clay. I personally hand form mine. I make round beads then roll them under a clear square of acrylic so I can watch the shape. When it is how I want it, the beads is ready to be baked. At this point I add the hole but you can drill the clay after it is baked.
There are many other ways of forming the lentil shape. You can buy some of the metal palette pans that artists use for their paints. Press the clay in the bottom, bake and then glue two of the halves together. The cover the seam use a ‘ribbon’ of clay or roll a ‘snake’ and twist it for some detail.
If you don’t want to buy the pans. You can use burnt out light bulbs or some other curved glass. To get the round shape, use a round cutter to cut the circle. To make the edges beveled, you can cover your clay with siren wrap before cutting. The plastic wrap won’t cut but will push on the sides to bevel them. Place the circles on the bulbs so that they will have the same curve and bake them. The bulbs will be fine in the oven at the temps that we bake clay at. You could also use the sides of a drinking glass or almost anything glass object.
You can also use round marbles, aluminium cans, measuring spoons or almost anything that has the ‘dome’ effect that you want your lentils to have. I would test bake any found object just to make sure it is safe at the temperature that you bake your clay at.
The holes that you need to string your lentils with can be made before you glue the halves together by sanding the area, or by drilling.