I have seen a couple of knives that did not handles in the traditional set up. What they had was a handle attached to the back 1/3rd of the spine. The blade was fairly wide. The set up allowed for chopping and slicing. You want a curved blade, but not quite like a ulu, only curved at the 1/3rd tip end. The user can then rock the knife to chop and it can be used as a slicer. Also, you might want to consider a nail board. This is a board with scution cups on the back and 2 nails sticking up through the board to be used to secure items to be sliced. There should be info on the internet regarding this topic. I'll see what I can find.