Zero Hot Springs Recipe

Prepare aromatics

Peel the ginger and slice into thin rounds. Smash the garlic cloves lightly with the flat of a knife and peel. Slice 1 scallion white (from the scallions) thinly for the broth and reserve the green tops for garnish.

In a medium saucepan, combine the vegetable stock and 1 cup water. Add the ginger rounds, smashed garlic, and sliced scallion whites. Bring to a gentle simmer over medium heat.

Lower heat to maintain a gentle simmer and let the aromatics infuse for 8–10 minutes. This builds a clean, fresh base reminiscent of mineral hot-spring steam without heavy spices.

Remove the pan from heat and strain out the ginger, garlic and scallion whites (or leave them in if you prefer a chunkier broth). Return the strained warm stock to the pot over very low heat.

In a small bowl, whisk together the white miso paste with 3 tablespoons of the warm broth until smooth (tempering). Stir the miso slurry back into the pot. Add soy sauce, rice vinegar, sesame oil and mirin if using. Taste and adjust seasoning with up to 1/2 tsp salt and 1/4 tsp black pepper. Keep the broth warm but not boiling — miso loses freshness if boiled aggressively.

Bring a separate large pot of water to a rolling boil. Add a pinch of salt and the soba noodles. Cook according to package directions until just tender (usually 4–5 minutes). Reserve 1/2 cup of the noodle cooking water, then drain the noodles and rinse briefly under cold water to stop cooking and remove excess starch. Set aside.

While noodles cook, prepare the vegetables: halve the baby bok choy lengthwise, slice shiitake, julienne the carrot, and trim the snow peas.

In a skillet over medium heat, add 1/2 tsp sesame oil. Sauté shiitake slices 2–3 minutes until softened. Add carrots and snow peas and toss 1–2 minutes — you want them bright and slightly crunchy. Add baby bok choy cut-side down and let wilt for 1–2 minutes. Remove from heat.

If you prefer the vegetables blanched for a lighter texture: briefly plunge bok choy, snow peas and carrot into the boiling noodle water 30–45 seconds, then transfer to an ice bath and drain.

If using soft-boiled eggs, bring a small pot of water to a gentle boil. Lower eggs in and cook 6–7 minutes for jammy yolks. Immediately transfer to an ice bath for 3 minutes, then peel and halve.

For tofu: pat tofu dry. If you like a little texture, pan-fry cubes in 1 tsp sesame oil over medium heat until edges are golden (about 4–5 minutes), turning gently. For a softer option, add cubes directly to the warm broth to heat through for 1–2 minutes before serving.

Prepare garnishes: cut nori into thin strips, chop reserved scallion greens, and toast sesame seeds in a dry skillet 1–2 minutes until fragrant.

Reheat the miso broth gently if needed. If the broth seems too intense, add up to 1/4 cup reserved noodle water to mellow it.

Divide the drained noodles between two large bowls (serves 2). Ladle the hot ginger-miso broth over the noodles until they are mostly submerged.

Arrange the sautéed or blanched vegetables on top of the noodles. Add tofu cubes and halved soft-boiled eggs (if using).

Sprinkle scallion greens, toasted sesame seeds, nori strips and cilantro (or mitsuba) over each bowl. Add a drizzle of chili oil or a pinch of chili flakes if you want heat, and serve lime wedges on the side for bright acidity.

Taste the final bowls and adjust with a small pinch more salt, a splash of soy sauce or a squeeze of lime as needed. Serve immediately so noodles remain tender and broth aromatic.