Trim the root of enoki mushrooms, cut them in half, and separate them. Tear maitake mushrooms into bite-sized pieces. Cut king oyster mushroom in half lengthwise, then slice into 1cm thick pieces.

Place enoki, maitake, and king oyster mushrooms in a microwave-safe container with 1 tbsp water. Cover loosely with plastic wrap and microwave at 600W for 2 minutes and 30 seconds until softened. Let cool and drain excess water thoroughly.