01 - Heat olive oil in a large pot over medium heat. Add diced onion and sauté for 3 to 4 minutes until translucent and softened.
02 - Add 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 aromatic flavors.
04 - Pour in the vegetable broth and water. Bring to a boil, then reduce 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 purée 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 low heat if needed. Whisk in the miso paste and soy sauce until fully dissolved. Gently warm without boiling to preserve the miso's live cultures and delicate flavor.
07 - Taste the soup and adjust seasoning with salt and freshly ground black pepper as desired.
08 - Ladle the soup into bowls. Garnish with chopped scallions, toasted sesame seeds, and a light drizzle of sesame oil if desired.