Gently wipe each mushroom cap with a damp cloth to remove dirt, then carefully remove the stems and set the caps aside.
Finely chop the mushroom stems. In a small skillet over medium heat, sauté the chopped stems with a splash of olive oil until fragrant and slightly golden, about 3-4 minutes. This develops their earthy aroma and concentrates their flavor.
In a mixing bowl, combine the softened cream cheese, the sautéed mushroom stems, minced garlic, chopped parsley, lemon juice, and a pinch of salt and pepper. Stir until the mixture is smooth and well combined.
Spoon the filling generously into each mushroom cap, pressing lightly to fill all the nooks and crannies. Place the stuffed caps on a baking sheet.
Sprinkle breadcrumbs evenly over the stuffed mushrooms and drizzle with a little olive oil for extra crispness. This helps create a beautiful golden top during baking.
Bake in a preheated oven at 375°F (190°C) for 20-25 minutes, until the tops are golden brown and the filling is bubbling around the edges. Keep an eye on them to prevent over-browning.
Remove the mushrooms from the oven and let them rest for 5 minutes. This allows the filling to set slightly and makes them easier to serve without spilling.
Arrange the mushrooms on a serving platter, garnished with extra parsley if desired. Serve warm to enjoy the gooey filling and crispy tops, savoring the earthy aroma and rich flavors.