Sup Miso Tomat dan Tahu

Bahan-bahan (4 porsi)

• 1 piece kombu (dried kelp) ((⅓ oz, 10 g; 4 x 4 inches or 10 x 10 cm per piece))
• 4 cups water
• 12 cherry tomatoes
• 7 oz soft/silken tofu (kinugoshi dofu) ((½ typical 14-oz package))
• 4 Tbsp miso