To Make the Rounds: ideally you want to use a 2" diameter round cutter (I bought a stainless 11 piece
round cutter set and have been getting great use of it) you can also use the back of a small glass (shot glass maybe) which is what I've typically used in the past
The Salmon: I used hardwood smoked wild Alaskan salmon (sliced)
The Bread: use any bread (including GF variety) or cracker here. If you wish to skip the bread, I suggest sliced cucumber for the base.