Begin by boiling the lo mein noodles or spaghetti in a pot of salted water according to the instructions on the package. Cook them just until they are al dente for the perfect texture. Once done, drain the noodles and rinse them under cold water to halt the cooking process and prevent them from becoming mushy. Toss the cooled noodles with 1 tablespoon of sesame oil to keep them from sticking together.

In a small mixing bowl, combine soy sauce, oyster sauce, sugar, garlic, ginger, and the remaining tablespoon of sesame oil. Whisk the ingredients together until the sugar is fully dissolved, creating a fragrant, savory sauce. Set this mixture aside for later use.

In a large skillet or wok, heat the vegetable oil over medium heat. Once the oil is shimmering, add the prepared noodles to the skillet. Stir-fry them for 2 to 3 minutes, allowing the noodles to warm through and take on a slightly crisp texture in places.

Pour the pre-mixed sauce over the noodles in the skillet. Use tongs or a spatula to toss the noodles, ensuring that every strand is thoroughly coated in the flavorful sauce. Continue cooking for an additional 2 minutes, letting the noodles absorb the sauce and develop a rich, savory taste.

Remove the skillet from the heat and transfer the noodles to a serving dish. For added flair, garnish the noodles with chopped green onions or a sprinkle of sesame seeds, if desired. Serve the lo mein hot and enjoy its simple yet delicious flavors.