Wash the lettuce dry with paper towels or salad spinner. Tear the leaves and place on a platter.
Heat 1 tablespoon of oil in a cast iron skillet heat on high heat. When it is hot saute the mushrooms turning often just until golden in spots. Add salt and pepper and set aside.
Drizzle the rest of the oil over the lettuce leaves, sprinkle with vinegar add salt and pepper and turn the leaves with tongs.
Arrange the mushrooms in the center of the greens. Add the parmesan onto the salad and serve.