I didn't use a pattern, just improvised as I went.
Used Knitpicks palette in white, rose hip and tranquil (one ball of each), size 0 dpns, polyfill, plus some card for the soles of the sandals and the bread slices in the sandwich. Scrap yarn for the four sandwich colours. And buttons, obviously.
I like his slightly derpy face. :3 His white coat is totally removable; he's wearing green scrubs underneath.