Heat the olive oil and butter in a large frying pan over a medium to high heat. Add the mushrooms and the chopped clove of garlic and cook for 4 minutes, until browned. Add the chopped parsley and season with salt and freshly ground black pepper, to taste.   Keep the mushrooms warm while you toast the bread.

Heat a griddle pan on a high heat.  Lightly toast the slices of bread on the hot griddle pan, until they are light brown on both sides.  Rub each slice lightly with the cut clove of garlic, then drizzle with some extra virgin olive oil and sprinkle lightly with a little sea salt and black pepper.

Serve the warm garlic mushroom mixture on the toasted slices of bread, with garnish with extra chopped parsley.