1. In a medium-sized bowl, add beaten egg, onion, ground pork, tomato, fish sauce and soy sauce. Stir untill all ingredients mixed well.
2. Heat oil in a wok over medium heat. then pour in the egg mixture. Fry until golden brown (about 2 minutes on each side).
3. Transfer the omelette to a plate. Garnish on top with coriander leaves and fresh vegetables (cucumber, tomato, etc.) Serve immediately with dipping sauce and hot steamed rice.