3Place the shredded mushrooms on a plate that can fit into the steamer. Sprinkle with the salt and toss a few times to mix well. Place the plate inside the bamboo steamer or on the steamer rack, then place onto the pot of water. Steam, covered, for 8 minutes, or until just cooked through. Remove the steamer from the heat immediately. Carefully uncover the steamer and let the steam out. Use oven mitts to remove the plate from the steamer.