Directions
Pulse the sandwich bread in a food processor to form coarse crumbs. Add the beef, 1/4 cup onion, mushroom, 1 tablespoon garlic, parsley, and egg white; season with salt, pepper and nutmeg; pulse again to finely chop and combine. Portion into about 20 meatballs (about 1-inch in diameter) and place on a plate.
