How to Make It
In a large pot of salted boiling water, cook the pasta until al dente. Drain, reserving 1/2 cup of the cooking water.
Meanwhile, in a large skillet, heat the olive oil. Add the mushrooms and garlic and cook over moderate heat, stirring occasionally, until golden and tender, about 8 minutes.
Stir the pasta, reserved cooking water and the butter and parsley into the mushrooms and cook, tossing, until saucy, about 2 minutes; season with salt and pepper. Serve with lemon wedges.