Many grocery stores carry miso paste nowadays, but you may have to venture to Cost Plus or your nearest asian grocery to find dashi granules. I used Hon-Dashi.
4 cups water
1-2 tsp dashi granules (start on the low side and go up as you like)
2-3 Tbsp miso paste (I used mellow white, but the brown kind is ideal)
1 block tofu (10-12 oz.), in small 1/2 inch cubes
A couple handfuls of fresh spinach (optional)
2 green onions, chopped (optional)
Bring water to a boil in medium saucepan. Reduce heat to medium. Add dashi granules, tofu, spinach, and green onions. Cook until spinach is soft and bright green. Remove from heat. Add miso paste and stir until blended.
Makes 2-4 servings
Note: You don't want to boil the miso as many people believes this kills off the good bacteria in the miso.