Oyakodon (Mangkuk Nasi Ayam dan Telur)

Bahan-bahan (2 porsi)

• ½ onion ((4 oz, 113 g; peeled))
• 10 oz boneless, skinless chicken thighs
• 1 Tbsp sake ((for marinating the chicken; substitute with Chinese rice wine or dry sherry, or omit))
• 3 -4 large eggs (50 g w/o shell)
• ½ cup dashi (Japanese soup stock)
• 2 Tbsp soy sauce
• 2 Tbsp mirin
• 2 tsp sugar
• 2 servings cooked Japanese short-grain rice ((typically 1⅔ cups (250 g) per donburi serving))
• 4 sprigs mitsuba (Japanese parsley) ((or green onion/scallion))
• shichimi togarashi (Japanese seven spice) ((optional))
• Japanese sansho pepper ((optional))