Steamed Egg Custard

Instructions

1. Prepare the custard base
   In a medium bowl, gently beat the eggs, being careful not to create too many bubbles. Slowly whisk in the warm dashi stock, soy sauce, mirin, salt, and grated ginger. Strain the mixture through a fine-mesh sieve to remove any egg solids and ensure a silky texture.
2. Prepare the steaming vessels
   Divide the sliced shiitake mushrooms, chicken or shrimp pieces (if using), and green peas equally among four heatproof custard cups, ramekins, or small bowls. Gently pour the strained egg mixture over the fillings, dividing it equally.
3. Cover and prepare for steaming
   Cover each cup tightly with aluminum foil or plastic wrap to prevent water droplets from falling onto the custard during steaming. Fill a large pot with about 1-2 inches of water and bring to a gentle simmer. Place a steaming rack inside the pot.
4. Steam the custard
   Carefully place the covered cups on the steaming rack, ensuring they are stable and the water doesn't touch the cups directly. Cover the pot with a lid and steam over low heat for 15-20 minutes, or until the custards are set but still have a slight jiggle in the center when gently shaken.
5. Test for doneness
   To check for doneness, insert a toothpick or skewer into the center of one custard - it should come out clean. The texture should be delicate and wobbly, similar to silken tofu, but fully set. If not done, steam for an additional 2-3 minutes and check again.
6. Serve
   Carefully remove the custard cups from the steamer and let cool slightly for 2-3 minutes. Remove the foil covers, garnish with chopped scallions, and serve immediately while still warm. The custard can be served in its cooking vessel or gently turned out onto serving plates.