Garlic Mushrooms

Bahan-bahan (4 porsi)

• 4 tablespoons unsalted butter
• 1 tablespoon olive oil
• 1/2 onion (chopped, optional)
• 1 pound cremini mushrooms (button mushrooms)
• 2 tablespoons dry white wine (optional)
• 1 teaspoon fresh thyme leaves (chopped)
• 2 tablespoons fresh parsley (chopped)
• 4 cloves garlic (minced)
• 1 pinch salt (to taste)
• 1 pinch pepper (to taste)