CHINESE LEAF AND MUSHROOM ROLLS

1 Chinese leaf • 1 tbsp sunflower oil • 1 tbsp oyster sauce • 1 tbsp light soy sauce • ½ tsp sugar • 1 tsp cornflour | Filling • 1 tbsp sunflower oil • 1 tbsp salted butter • 15g fresh root ginger, grated • 250g chestnut mushrooms, roughly chopped • 1 red chilli, finely chopped • 2 cloves garlic, finely chopped • 1 small onion, finely chopped • 1 tsp oyster sauce • 1 tsp light soy sauce • 1 tsp white wine vinegar • ¼ tsp salt