Doong Gwoo Chow Ngau Yook - stir-fry of beef with mushrooms

Doong Gwoo Chow Ngau Yookstir-fry of beef with mushroomsIngredients:250 gr beef7 shiitake mushrooms1/2 tsp five-spice powder (see recipe)1/2 tsp salt2 cloves of garlic1 cm jahe2 tsp palm sugar2 tbsp dark soy sauce2 onions or 5 shallots2 tsp cornflour + 1 tbsp water4 tbsp beef stock (see recipe)1 tbsp oilGarnish:1 spring onionPreparation:Cut the meat into thin strips. Cut the mushrooms into strips. Finely chop the garlic and onions. Grate the jahes. Cut the spring onion into thin rings.In a bowl, combine the garlic, jahe, salt and five-spice powder, then mix in the meat and let it marinate for 15 minutes.Heat the oil in a pan and fry the onions and mushrooms for 3 minutes. Then add the seasoned meat and fry until it changes color. Then add the soy sauce, palm sugar and stock and bring to the boil.Then mix in the cornstarch solution and stir until the sauce thickens. Then sprinkle the spring onion on top and serve.