heat up a wok or a medium sized sauce pan, 1 minutes;
add 1-2 tbsp oil, heat up the oil, .5 minute;
add in chopped green onions, you can save a little green part for later. Sizzle the green onion briefly, but DON'T let it burn;
add in tomatoes, then salt, stir and cook it to sauce like;
add water, bring to boil;
turn off the heat;
drizzle in the egg;
sprinkle the saved green onion, and serve.