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1
Bring the warm leftover ramen or dashi broth to a gentle simmer in a medium saucepan over medium heat; taste and adjust seasoning with soy sauce, mirin, and sea salt as needed.
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2
Place warm cooked rice in two deep bowls, pressing gently to form a loose mound in the center.
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3
Crack the egg into a small bowl and beat gently with a fork until the yolk and white are just combined.
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4
Pour the simmering hot broth slowly over the rice in both bowls, allowing it to absorb gradually; the rice should be moistened and begin to soften into a porridge-like consistency.
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5
Drizzle the beaten egg in a thin stream over the center of each bowl while stirring gently with chopsticks; the residual heat will cook the egg into silky ribbons throughout the rice.
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6
Scatter the sliced scallions, julienned ginger, and shredded chāshū evenly over each bowl; drizzle with sesame oil and scatter nori strips over the top.
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7
Finish with a light pinch of shichimi togarashi on each bowl; serve immediately while the broth is still steaming hot.
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8
Eat with a spoon, allowing the soft rice and warm broth to be consumed together as a comforting, loose porridge.