Watercress & Spinach Soup

Ingredients

• 1 large onion, peeled and chopped
• 1 banana shallot, peeled and chopped
• 2 garlic cloves, peeled
• 1 tsp Seaweed Agogo Kombu
• 1 large baking potatoe, peeled and sliced
• 1 umami instant stock sachet
• 3 cups warm water
• 2 cups watercress, packed tight
• 2 cups spinach, packed tight
• 1 heaped tbsp sweet white miso