Preheat the oven to 375°F (190°C).
Clean the mushrooms and remove the stems.
Finely chop the mushroom stems and sauté them in olive oil with garlic until softened.
In a bowl, combine ricotta, chopped stems, Parmesan, parsley, breadcrumbs, and seasonings.
Stuff the mushroom caps generously with the filling mixture.
Arrange the stuffed mushrooms on a baking sheet and sprinkle with additional Parmesan.
Bake for 20-25 minutes until the mushrooms are tender and tops are golden brown.
Allow to cool slightly before serving.