1. Stir-Fry the Ingredients: Heat the cooking oil in a pan and sauté the chopped shallots until fragrant. Add the oyster mushrooms and shiitake mushrooms, seasoning with a pinch of salt, and stir-fry over high heat for 3 minutes.
2. Add the Vegetables: Next, incorporate the tomato, soy sauce, vegetarian oyster sauce, ketchup, vegetarian seasoning, and salt, mixing well. Add the celery and bell peppers, continuing to stir-fry over high heat for another 3 minutes.
3. Combine with Noodles: Add the cooked noodles to the pan and stir-fry everything together over high heat for 2 minutes, allowing the noodles to absorb the delicious flavors while mixing with the fresh vegetables and mushrooms.

You can enjoy these stir-fried vegetarian noodles for breakfast or as a main meal throughout the day!