Miso Nikomi Udon 味噌煮込みうどん
3 cups stock
2 green onions
1 piece aburaage (deep-fried tofu pouch) (or 2 small aburaage pieces)
1 chicken thigh (7 oz, 200 g)
2 servings udon noodles (1.1 lb, 500 g frozen or parboiled udon noodles; 6.3 oz, 180 g dry udon noodles)
2 large eggs
shichimi togarashi (Japanese seven spice) (for sprinkling)
For the Seasonings
3 Tbsp mirin
4 Tbsp miso (divided; I used Hikari Miso® Organic Red Miso)