Earthy white, shiitake, and oyster mushrooms transform into a deeply savory side dish when seared in butter. Finely chopped shallots and garlic build a rich base, while fresh thyme leaves cut through the umami with a bright, herbal note. They're cooked until perfectly tender and caramelized, making them a fantastic pairing for roasted meats or a hearty topping for thick slices of toasted sourdough. You'll love how this rustic preparation makes a simple dinner feel special without requiring hours at the stove.