Chinese Tomato Egg Stir-fry | Umami

Ingredients

• 4 small to medium tomatoes (about 500 g, 1 pound)
• 1 scallion
• 4 eggs
• 3/4 tsp salt (divided, or to taste)
• 1/4 tsp white pepper
• 1/2 tsp sesame oil
• 1 tsp shaoxing wine
• 3 tbsp vegetable oil (divided)
• 2 tsp sugar
• 1/4-1/2 cup water