Creating the Ultimate Beef Lo Mein can be achieved by following these simple steps:

1. Cook Noodles: Start by boiling a pot of water. Add the lo mein noodles and cook according to package instructions. Drain and set aside.
2. Prepare Beef: In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat. Add the thinly sliced flank steak. Stir-fry for 3-4 minutes until browned and cooked through. Remove the beef from the pan and set aside.
3. Sauté Vegetables: In the same skillet, add another tablespoon of vegetable oil. Add the minced garlic, ginger, sliced bell pepper, and julienned carrots. Stir-fry for about 3-4 minutes or until vegetables are tender-crisp.
4. Combine Ingredients: Return the cooked beef to the skillet and add the cooked noodles to the pan.
5. Make Sauce: In a small bowl, mix together soy sauce, oyster sauce, sesame oil, and sugar. Pour this mixture over the noodle and beef mixture in the skillet.
6. Toss Together: Gently toss everything together with tongs or a spatula until the beef, vegetables, and noodles are evenly coated with the sauce and heated through, approximately 2-3 minutes.
7. Season and Serve: Add salt and pepper to taste. Finally, garnish with chopped green onions and sesame seeds if desired.

These steps simplify the cooking process and provide a delicious meal that you can replicate effortlessly.