Prepare the marinara sauce according to this recipe.
Using a sharp chef’s knife, slice the partially frozen chicken lengthwise into thin slices. Set 3 or 4 of the slices on top of each other and, again, slice thinly into long strips. Turn the strips 45 degrees and cut again into a small dice (smaller than a pea). As you dice the chicken, add it to a medium-large bowl.
See Café Tips above for more detailed instructions and tips.
Recipe will serve 4-6 with 2-3 meatballs per person.
Nutritional information is for 2 of the chicken meatballs. It does not include the marinara. See that recipe for its nutritional info.