Spinach with Walnut Dressing

1/2 lb spinach, washed, de-stemmed
4 large (or 6 small) whole walnuts
1 tsp sugar
4 tsp soy sauce

Parboil spinach, rinse in cold water, squeeze out water, chop a bit. Make the dressing by mashing the walnuts in a mortar and pestle and adding the sugar and soy sauce. Toss spinach with dressing.

Source: Zen Vegetarian Cooking by Soei Yoneda with Koei Hoshino, p. 172-173