Wild Mushroom Tartlets

Ingredients

• 2 lbs fresh or reconstituted mushrooms
• 1 leek
• 3 slices bacon
• 1 Tbsp kosher salt
• 1 ½ Tbsp ground black pepper
• 2 Tbsp dried thyme
• 1 ½ cups shredded gruyere cheese
• 1 sheet puff pastry