Combine almonds, pecans and cardamom seed in food processor. Process until almonds and pecans become a small grain. If you over process they will become more flour like which can still work, but I like a little crunch.
Add dates, cinnamon, ginger, vanilla, nutmeg, salt and pepper. Process until all the dates are fully mixed in broken down. It should form almost a dough-like look up against the sides of the processor. If it seems too dry, add a touch of water.
Roll into balls and store in the refrigerator.
Note, if using ground cardamom, I would start very light with maybe 1/8 tsp and then add to taste.