Chop up 1/2 cup of walnuts very fine. I use a knife, but you could process them. Mix them with 3/4 cup mascarpone cheese. Top crackers, or sourdough toast rounds, with the cheese mixture- flatten, and put a drop of pepper jelly in the middle. My friends LOVED these- they ate them all up. I was almost embarrassed to tell them how easy they were. These little guys are on the circular plate- I made some with, and some without, pepper jelly- I won't do that again. There were a few of the crackers without pepper jelly left after the evening was over.