Place the dried shiitake mushrooms in a bowl and cover with the boiling water. Cover the bowl with a plate and leave to rehydrate for 10-15 mins. Once fully rehydrated, squeeze out any excess water then finely slice the mushrooms. Reserve 4 tablespoon of the soaking water.
40 g dried shiitake mushrooms, 200 ml boiling water
Place a large frying pan over medium heat and add the vegetable oil. Add the garlic and fry for a minute but do not allow it to burn.
2 tablespoon vegetable oil, 2 cloves garlic
Add the carrot, kale, bean sprouts and spring onions. Fry for a few minutes until softened.
1 large carrot, 60 g kale, 110 g bean sprouts, 4 spring onions
Meanwhile, in a small bowl, whisk together the soy sauce, hoi sin sauce, 1 teaspoon cornstarch, Chinese 5 spice and the reserved mushroom water. Add to the frying pan and stir through. Cook for a further 2 minutes then remove from the heat.
1 tablespoon soy sauce, 1 tablespoon hoi sin sauce, 1 teaspoon cornstarch, ⅛ teaspoon Chinese 5 spice
Spread the filling mixture on a large baking sheet and leave to cool down.