In a large stock pot begin by cooking the noodles as instructed on the package. Once these are cooked, drain them with cold water and return them back to the stock pot and set aside.
In a large skillet, add in the oil and the veggies. Let this cook and simmer for 10-15 minutes until the veggies are soft. Next, add in the cooked, diced chicken and the beaten egg. Let this simmer an additional 10 minutes until the egg is nicely cooked and all the ingredients are mixed well.
Once the skillet mixture is well cooked meaning the egg is cooked and the veggies are soft, pour it into the stock pot with the noodles.
Next add in the soy sauce (1 cup) and mix well with the noodles and the skillet mixture. To get the desired taste and coloring of the lo mein you may need to add additional soy sauce to your acquired taste.
Mix well and serve!
Note: You can also add garlic and ginger to it for additional flavor.