Ingredients:
1 lb flank steak, thinly sliced against the grain
1 tbsp soy sauce
1 tbsp cornstarch
1 tsp sesame oil
1 tsp ground ginger
2 tbsp canola oil
Red chili peppers, sliced
1 onion, thinly sliced
3 cloves garlic, minced
5 oz fresh spinach
Instructions:
In a small bowl, whisk together soy sauce, sesame oil, cornstarch, and ginger until smooth.
Add sliced beef to the bowl and marinate for at least 15 minutes.
Heat 1 tbsp canola oil in a wok or large skillet over medium-high heat.
Add the marinated beef and stir-fry for 3 minutes or until browned. Transfer to a plate.
Add the remaining oil to the skillet and stir-fry the onion, red chili, and garlic for 3 minutes or until softened.
Return the beef to the skillet.
Add the spinach and stir-fry until wilted.
Serve over rice or noodles.