Prepare the Flavor Base: In a medium bowl, combine the grated garlic, ginger, and horseradish. Add the turmeric, apple cider vinegar, oil, and salt. Stir until a fragrant paste forms. Set aside.
Heat the Broth Base: Pour 8 cups of water into a large pot and bring it to a gentle boil over medium-high heat. Once steaming, lower the heat to maintain a simmer.
Mix the Miso: In a small bowl, whisk ½ cup of hot water with the miso paste until smooth and lump-free. Stir the miso mixture into the bowl with your flavor base until everything is well combined.
Combine and Infuse: Turn off the heat under the pot of hot water. Slowly pour the miso mixture into the hot water while whisking continuously. Add the fresh lemon juice and optional zest, stirring until fully incorporated. Avoid boiling after adding miso and lemon to preserve their delicate nutrients and probiotics.
Serve Warm: Ladle the golden broth into mugs or bowls. Garnish with sliced scallions or a light sprinkle of turmeric for color. Serve immediately while warm.
