This homemade chicken ramen has ridiculously flavorful broth, tender noodles, and is chock full of tasty toppings.
Heat the oil in a large stock pot over med/high heat. Season the chicken thighs generously with kosher salt.
Add the chicken thighs to the pot, skin-side down, and cook until golden brown, about 4-5 mins. Turn the thighs over and brown on the other side, an additional 4-5 mins.
Add the remaining ingredients to the pot and season with kosher salt. Bring to a simmer over med heat and then reduce to a bare simmer and cook, uncovered, for about 3 hours.
Remove the chicken thighs and reserve. Strain the broth and discard the remaining solids, pressing on the solids as you strain.
Remove the meat from the chicken thighs, shred, and store in the refrigerator until ready to use.
Cover and chill the broth in the refrigerator overnight. Once the broth is well chilled, skim the fat from the surface and discard.
Whisk the soy sauce and mirin together, reserve.
Preheat the oven to 450 degress F and line a sheet tray with parchment paper. Remove the stems from the shiitake musrooms and slice them.
Drizzle the sliced mushrooms with olive oil and season with kosher salt. Roast until golden brown, about 15 mins. Reserve.
While the mushrooms roast, make your 6-minute eggs and ramen noodles (cook according to package directions). For the eggs, bring a saucepan of water to a rolling boil. Lower the eggs into the water with a slotted spoon. Boil the eggs for 6 minutes EXACTLY and plunge into a bowl of ice water. Peel the eggs.
Add the tare to the strained and skimmed broth and warm over med heat until very hot. Taste and adjust seasoning.
Fill each bowl with one portion each of cooked ramen noodles, shredded chicken, roasted mushrooms, spinach, and scallions. Ladle the hot broth into the bowl and top each bowl with a halved 6-minute egg, a sprinkle of toasted sesame seeds, and a drizzle of toasted sesame seed oil.