Cozy Woodland Vegetarian Mushroom Galette Recipe

Ingredients

• 1 lb (1 pound) cremini mushrooms, thinly sliced
• 1 cup gruyere cheese, shredded
• 1 ¼ cups (1.25 cups) all-purpose flour
• ½ cup unsalted butter, cubed, at room temperature
• 1 small onion, diced
• 2 cloves garlic, finely chopped
• 1 tsp (1 teaspoon) fresh thyme, finely chopped
• ¼ cup crème fraîche or sour cream
• ¼ cup butter
• 1 tsp (1 teaspoon) salt
• ½ tsp (½ teaspoon) ground black pepper
• 1 egg, beaten
• 1 ½ tsps (1.5 teaspoons) salt
• 1 tbsp (1 tablespoon) melted butter
• ¼ cup ice water
• 2-3 fresh thyme twigs (for garnish)