Cook the egg noodles according to the package instructions. Drain and set aside.
In a small bowl, mix together soy sauce, oyster sauce, tomato ketchup, chili sauce, sugar, and ground white pepper. Set aside.
Heat vegetable oil in a large wok or frying pan over medium-high heat.
Add the sliced chicken or tofu and cook until golden brown and cooked through. Remove from the pan and set aside.
In the same pan, add a little more oil if needed. Sauté the minced garlic and sliced onion until fragrant and softened.
Add the sliced red bell pepper and cook for another 2-3 minutes.
Add the bean sprouts and cook for an additional 1-2 minutes.
Push the vegetables to one side of the pan and pour the beaten eggs into the empty space. Scramble the eggs until fully cooked, then mix with the vegetables.
Add the cooked noodles and the prepared sauce to the pan. Toss everything together until the noodles are evenly coated with the sauce and everything is heated through.
Add the cooked chicken or tofu back into the pan and mix well.
Transfer the Mee Goreng to serving plates.
Garnish with chopped green onions and fresh cilantro.
Enjoy your meal!