01 - Melt 2 tablespoons of butter with 1 tablespoon of olive oil in a large skillet over medium heat.
02 - Add the sliced mushrooms and cook for 6 to 8 minutes, stirring occasionally until softened and golden brown.
03 - Incorporate the minced garlic, thyme, salt, and pepper, cooking for 2 minutes until aromatic.
04 - Stir in chopped parsley and optional lemon juice, then adjust seasoning to preference.
05 - Toast bread slices until golden and crisp; immediately spread with 1 tablespoon of butter.
06 - Spoon the garlic mushroom mixture evenly over the toasted bread.
07 - Top with extra parsley and optional Parmesan cheese, serving promptly.