1. Heat oil in a pan, add the noodles, and stir-fry with a pinch of salt for 3 minutes. Remove the noodles and set them aside on a plate.
2. In the same pan, add more oil and heat it over medium heat. When hot, add the green and red bell peppers, onion, and 50 ml of water. Stir-fry for about 2 minutes, then remove and set aside.
3. Next, heat more oil in the pan, add the marinated beef, and stir-fry for about 1 minute until it’s slightly cooked. Then, add the sautéed bell peppers along with the prepared sauce.
4. Stir-fry for another 2 minutes until the beef and vegetables absorb the sauce, then add the chopped celery, stirring well before turning off the heat.

Serve the stir-fried beef over the noodles and enjoy!

The finished dish has a vibrant color, with tender, sweet beef that’s well-seasoned and not tough. The sauce is rich and fragrant, with a lovely aroma of celery. This stir-fried dish is best served hot with a side of soy sauce. Enjoy your meal!