Beef with Coriander, Chilli & Garlic

Ingredients Beef (500g) Soya sauce (marinade: 2tbsp; topping: 1tbsp) Oyster sauce (marinade: 2tbsp; topping: 1tbsp) Pepper (as desire) Sesame oil (1tbsp) Potato starch (2tsp) Chilli flakes (as desire) Red chillies (as desire) Minced garlic (1tsp) Sesame seeds (1tbsp) rapeseed oil (20ml) Coriander (50g)