Prepare Ingredients: Peel and dice potatoes. Chop onions, celery, and carrots. Mince garlic.
Sauté Vegetables: In a pot, heat olive oil and sauté onions, celery, carrots, and garlic until fragrant and soft.
Add Potatoes & Broth: Add diced potatoes and pour in vegetable broth. Bring to a boil, then reduce heat and simmer for 15–20 minutes until potatoes are tender.
Blend Chowder (Optional): For a creamier texture, partially mash the potatoes with a potato masher or blend half of the soup.
Add Miso: Remove a small amount of hot broth, dissolve miso paste in it, and stir back into the soup. Simmer for 2–3 minutes without boiling to preserve the miso’s flavor.
Season & Serve: Adjust salt and pepper to taste. Garnish with fresh herbs, green onions, or a drizzle of olive oil. Serve hot.