Bring a pot of water to boil and season well with salt. Add in the noodles and stir frequently to prevent them from sticking. When the noodles are al dente, reserve 1/2 cup of cooking water and drain the noodles. Rinse the noodles under cold water and drain well.
Heat 1/2 of the oil in a frying pan over medium heat. Add in the egg and scramble it. Remove the egg into a bowl when it's cooked.
Heat remaining oil in the same frying pan over medium heat. Add in most of the spring onion (reserving the rest for garnish) and stir-fry for 30 seconds until fragrant. Add in the cherry tomatoes splash in a bit of reserved cooking water. Turn the heat up to medium-high and cook, squashing the cherry tomatoes and adding more cooking water until the tomatoes are soft. Add in the noodles and toss to coat. Stir in the egg. Add in more cooking water if needed (you may not need all the water). Taste and season with more salt if needed.
Transfer the noodles into a serving bowl, garnish with remaining spring onion and serve.
NOTES
- I used dried flat noodles - its width helps sauce cling on, but you can use fresh or other types of noodles. - If your noodle water is salty enough, you will not need to add anymore salt to the sauce. - Instead of cooking the noodles first then the sauce, you can cook them at the same time. Start cooking the egg once you add the dried noodles into the pot of water.