Spinach and Mushroom Miso Soup

Bahan-bahan (4 porsi)

• 4 shiitake mushrooms ((3 oz, 85 g))
• 1 small bunch fresh spinach ((2 oz, 60 g))
• 3 cups water
• 2 dashi packets
• 3 –4 Tbsp miso ((any miso type; start with the lesser amount and add more later, to taste))
• ¼ block soft/silken tofu (kinugoshi dofu) ((4.5 oz, 130 g))