Heat the olive oil, 3 turns of the pan, in large skillet over medium-high heat. Coarsely chop mushrooms and add to the pan, toss for 2 to 3 minutes then add the greens to wilt. Season with salt and pepper. Dress greens with lemon juice then toss with butter as it melts to form a sauce. Drizzle a little honey over the greens and serve.