2stalks lemongrasstrimmed and smashed (or 2 tablespoons lemongrass paste)
3 to 4dried kaffir lime leavestorn
1tablespoongrated fresh ginger
1smallyellow onionsliced
2cupsmushroomssliced (button, cremini, or oyster)
1cupcherry tomatoeshalved
1tablespoonsoy sauce
1tablespoonchili pasteor sambal oelek (adjust to taste)
2tablespoonslime juiceplus more to taste
1teaspoonsugar
1(8-ounce) block firm tofucubed
½cupchopped cilantroplus more for garnish
Instructions
In a large pot over medium heat, add the vegetable broth, water, lemongrass, kaffir lime leaves, and ginger. Bring to a gentle boil, then reduce to a simmer and cook for 8 to 10 minutes to infuse the broth.
Add the onion and mushrooms and simmer for 5 minutes, until the mushrooms soften.
Stir in the cherry tomatoes, soy sauce, chili paste, lime juice, and sugar if using. Simmer for 3 to 4 minutes.
Add the tofu and cook for 2 to 3 minutes, just until heated through.
Remove from heat and stir in the cilantro.
Taste and adjust lime, salt, or heat as needed. Serve hot.
Notes
Crush aromatics: Crush/break the lime leaves and lemongrass to release their flavor.
To control spice: Start with a little and increase the chili paste to taste to ensure you don’t accidentally make it too spicy.
Simmer aromatics first: It’s important to simmer the lemongrass and kaffir lime leaves first to build flavor into the soup.
Remove aromatics: Remove the lemongrass and lime leaves before serving or eat around them.