01 - Combine olive oil and butter in a large skillet over medium-high heat until the butter is melted and foamy.
02 - Add quartered mushrooms and sauté for 5 to 7 minutes, stirring occasionally, until they release moisture and start to brown.
03 - Incorporate minced garlic and cook for 1 to 2 minutes, stirring frequently, until fragrant without browning.
04 - Pour in white wine if using, and simmer for 1 to 2 minutes to reduce liquids slightly.
05 - Season with salt and black pepper, stir in lemon juice and half the parsley. Remove from heat and transfer to a serving dish.
06 - Sprinkle remaining parsley over the mushrooms before serving.