After trying many different ways of threshing, I've discovered the food processor works the fastest and easiest! I had first thought I'd use the blunt dough blade to thresh but it didn't do a thing. So I switched to the regular blade and cringed as I thought I'd get a bunch of little lentil pieces very quickly. It worked though and I got a quart threshed and winnowed very quickly.
Here are my lentils right now. About 2 cups intensively planted on a brand new hugelkultur.