Chinese Tomato Egg Stir-fry

Bahan-bahan (2 porsi)

• 4 small to medium tomatoes ((about 500 g, 1 pound))
• 1 daun bawang
• 4 telur
• 3/4 tsp salt ((divided, or to taste))
• 1/4 tsp lada putih
• 1/2 tsp sesame oil
• 1 tsp anggur Shaoxing
• 3 tbsp vegetable oil ((divided))
• 2 tsp gula
• 1/4 -1/2 cup water