Cut the fried tofu in half horizontally, then into 1cm slices.

Slice the king oyster mushrooms in half lengthwise, then into thin diagonal slices. Cut the green onion into 1cm diagonal slices.

Heat salad oil in a frying pan over medium heat. Add the beef and stir-fry until the color changes.

Add the mushrooms and green onion to the pan and stir-fry until softened. Push them to the side, then add the tofu and sear both sides.