Dashi Onion Clear Suimono

Description

A delicate traditional Japanese clear soup featuring sweet onions simmered gently in kombu and bonito dashi broth, enhanced with light soy and sake for subtle umami. Thinly sliced shiitake mushrooms and mitsuba leaves provide fresh contrast while keeping the broth crystal clear. This elegant starter highlights simplicity and seasonal ingredients with about 25 minutes total cook time.

Cultural Background

Suimono, meaning "something to sip," is a traditional Japanese clear soup dating back centuries and central to kaiseki ryori and everyday home cooking. It relies on high-quality dashi made from kombu seaweed and katsuobushi bonito flakes to create a pure, umami-rich base that showcases seasonal ingredients without overpowering them. The emphasis on clarity and minimal seasoning reflects Zen-influenced aesthetics and the Japanese appreciation for natural flavors in dishes served at formal meals or as starters.

Recipe Info

PREP TIME: 10 minutes
COOK TIME: 15 minutes
TOTAL TIME: 25 minutes
SERVINGS: 4
DIFFICULTY: Easy

Ingredients

• 4 cups water
• 1 piece dried kombu (about 4x6 inches)
• 1/2 cup bonito flakes (katsuobushi)
• 1 large sweet onion, thinly sliced
• 4 medium fresh shiitake mushrooms, stems removed and caps thinly sliced
• 1 teaspoon light soy sauce (usukuchi shoyu)
• 1 teaspoon sake
• 1/4 teaspoon salt, or to taste
• 8 sprigs mitsuba (Japanese parsley), stems trimmed and leaves separated (or substitute with thinly sliced green onion tops)

Instructions

1. In a medium pot, combine the water and kombu; let soak for 5 minutes if time allows, then heat over medium-low heat until just before boiling (small bubbles form around the edges, about 140-150°F), remove the kombu, and bring to a gentle simmer.
2. Add the bonito flakes to the pot, simmer gently for 30-60 seconds without stirring vigorously, then turn off the heat and let steep for 5 minutes; strain through a fine mesh sieve or cheesecloth into a clean pot, pressing lightly on the flakes to extract flavor while keeping the broth clear.
3. Return the dashi to low heat, add the thinly sliced sweet onion, and simmer gently for 5-7 minutes until the onion is translucent and tender but not browned, maintaining a bare simmer to preserve clarity.
4. Add the thinly sliced shiitake mushrooms and continue simmering for 2-3 minutes until just softened.
5. Stir in the light soy sauce, sake, and salt; taste and adjust seasoning lightly to keep the broth delicate and clear.
6. Ladle into small bowls, garnish each with 2 sprigs of mitsuba leaves, and serve immediately while hot.

Tips

- Use the gentlest simmer possible after adding ingredients to prevent clouding the broth; avoid boiling after straining the dashi.
- Do not over-simmer the onions or mushrooms, as this can release starches or cloud the soup and dull their fresh flavor.
- Substitute light soy with a mix of regular soy diluted with a bit of water if usukuchi is unavailable, or use vegetable dashi for a vegetarian version.

Nutrition

Calories: 45
Protein: 2g
Carbs: 7g
Fat: 0g

Tags

Soup/Stew, Japanese