Step 1: Prepare the Bread

1. Preheat your oven to 375°F (190°C).
2. Arrange the bread slices on a baking sheet and brush both sides with olive oil.
3. Bake for 8-10 minutes, flipping halfway through, until the bread is golden and crisp.
4. While still warm, rub the toasted bread with the halved garlic clove for extra flavor.

Step 2: Cook the Mushrooms

1. Heat olive oil and butter in a pan over medium heat.
2. Add the sliced mushrooms and cook for about 5 minutes, stirring occasionally.
3. Stir in the minced garlic, salt, pepper, and thyme, cooking for another 3-4 minutes until the mushrooms are soft and fragrant.
4. If using balsamic vinegar, add it now and cook for 1 more minute to enhance the flavors.
5. Remove from heat and stir in fresh parsley.

Step 3: Assemble the Bruschetta

1. Spoon the mushroom mixture evenly onto each toasted bread slice.
2. Drizzle with extra olive oil or balsamic glaze if desired.
3. Serve immediately while warm.