Sup Tetesan Telur Tahu

Bahan-bahan (2 porsi)

• ½ block medium-firm tofu (momen dofu) ((7 oz, 200 g))
• 1 large egg (50 g w/o shell)
• 2 g reen onions/scallions ((for the soup and garnish))
• white pepper powder ((optional))
• 1 inch ginger ((2 tsp grated))
• 2 cups vegetable stock/broth ((or water + 2 tsp vegetable bouillon))
• 2 tsp toasted sesame oil
• ¼ tsp Diamond Crystal kosher salt
• ⅛ tsp freshly ground black pepper
• 2 tsp potato starch or cornstarch ((for a slurry))
• 1 Tbsp water ((for a slurry))