Spinach with Sesame Dressing

1 lb spinach, washed and parboiled
4 tbsp white sesame seeds
1 tsp sugar
2 tsp soy sauce
3 tbsp dashi

Toast sesame seeds, grind in a mortar and pestle. Add sugar, stir, add soy sauce and dashi, and mix (almost whip) to blend well. Add more sugar if necessary.
Chop spinach into 1 1/2-inch lengths. Lightly use the pestle to mix the spinach and dressing- a little bruised but not crushed.

Source: Japanese Cooking, a Simple Art, by Shizuo Tsuji, p. 253