Step 1

In a large pot over medium-high heat, warm the oil. Add the lemongrass, green onions, garlic and jalapeño and cook until fragrant, about 4 minutes. Stir in the broth, mirin, soy sauce and miso until combined and bring to a simmer. Add the kombu and continue to simmer until the flavors deepen, about 15 minutes. Strain and discard the solids before using the broth as directed in your recipe. Makes about 8 cups.

Step 2

Williams Sonoma Test Kitchen