Heat a frying pan over high heat and add 1 tablespoon of olive oil.
Add the garlic and fry for 30 seconds, then add the sliced mushrooms.
Saute the mushrooms until they are soft. Season with salt and pepper.
While the mushrooms are cooking, in a separate frying pan or griddle pan, drizzle your bread with the remaining olive oil and toast, flipping and toasting on both sides, until golden.
To assemble, place a generous amount of the garlic mushrooms on each toast and season with sea salt and ground black pepper if needed. And garnish with the freshly grated Parmigiano-Reggiano and fresh parsley.