01 - Heat olive oil in a large pot over medium heat. Add the diced onion and sauté for 3 to 4 minutes until translucent and softened.
02 - Add the minced garlic and grated ginger to the pot. Cook for 1 minute, stirring constantly, until fragrant.
03 - Stir in the sliced carrots and cook for 2 to 3 minutes, allowing them to lightly caramelize and absorb the aromatics.
04 - Pour in the vegetable broth and water. Bring to a boil, then reduce the heat to low and simmer for 15 to 20 minutes until the carrots are fork-tender.
05 - Remove the pot from heat. Use an immersion blender to puree the soup directly in the pot, or carefully transfer to a countertop blender in batches and blend until completely smooth.
06 - Return the soup to the pot if needed. Whisk in the miso paste and soy sauce until fully dissolved. Gently warm over low heat, but do not boil, to preserve the miso's live cultures and nuanced flavor.
07 - Taste the soup and adjust with salt and freshly ground black pepper as desired.
08 - Ladle into bowls and garnish with chopped scallions, toasted sesame seeds, or a light drizzle of sesame oil if desired.