Cook the noodles

• Boil the sweet potato glass noodles according to the package instructions.
• Drain and rinse under cold water, then set aside.

Prepare the vegetables

• Cut up the onion, mushrooms, carrots and spinach.

Make the sauce

• Whisk the soy sauce, oyster sauce, sesame oil and sugar together in a bowl.

Sauté the vegetables

• Sauté the onion first for a couple of minutes.
• Add the mushrooms and garlic, then the carrots and spinach.
• Season with the black pepper and keep the vegetables crisp, not soggy.

Combine and finish

• Add the noodles and the sauce to the pan.
• Mix well until everything is coated, then top with sesame seeds.