Bœuf sauté au poivron vert

Qīng Jiāo Niú Ròu - 青椒牛肉stir-fry of beef with bell pepperIngredients:450 gr beef/tenderloin1 tbsp light soy sauce1/2 tbsp cornstarch1/4 tsp baking soda1/8 tsp salt2 tbsp water1/2 tbsp oilIngredients sauce:2 tbsp oyster sauce1 tbsp Shaoxing rice wine1/2 tbsp light soy sauce1/2 tbsp dark soy sauce1 1/2 tbsp cornstarch1/2 tsp palm sugar1/4 tsp pepper4 tbsp water1/2 tsp sesame oilOther ingredients:2 bell peppers1 onion4 cloves of garlic3 tbsp oilPreparation:Cut the meat into thin strips. Mix this with the soy sauce, cornflour, bicarbonate/baking soda, salt and water and knead until the liquid has been absorbed. Then mix in the oil and let it marinate for at least 15 minutes.Mix all ingredients for the sauce well and form a homogeneous sauce. Cut the peppers into thin strips and the onion and garlic into thin slices.Heat in a pan 2 tbsp oil and add the meat and brown it on one side. Then stir-fry the meat for 30 seconds until it is still slightly pink and set aside.Then add the remaining oil and fry the onion and garlic. Then add the bell pepper and fry it al dente. Then add the meat and fry the meat until done. Then add the sauce over low heat and cook until the sauce thickens. Serve.