3. Prep and marinate mushrooms
In the meantime, cut King oyster mushrooms into large “scallop sized” pieces. To make the marinade, combine olive oil, thyme, soy sauce, and golden balsamic in a small bowl. Place mushroom pieces in ovenproof baking dish, pour the marinade in, toss around to ensure even coating, and season with salt and pepper. Allow to marinate for about 2 hours.