Beef Bowl

Ingredients

• 1 pound (450 g) boneless beef short rib block, very thinly sliced
• 4 tablespoons sake
• 2 tablespoons sesame oil
• 1 medium-large onion, very thinly sliced
• 1 oz (30 g) ginger, cut into very thin shreds
• 2 tablespoons raw brown sugar
• 2 tablespoons mirin
• 5 tablespoons soy sauce
• 3/4 cup (180 ml) dashi or water
• Egg yolks and ground sansho (Japanese mountain pepper, optional)
• Some freshly-cooked white rice or brown rice