Sweet Potato, Caramelized Onion, Wild Mushroom & Goat’s Cheese Tarte

Ingredients

• 1 package Puff Pastry defrosted just prior to using
• 1 1/2 pounds sweet potatoes, peeled and sliced into 1/4-inch-thick slices
• 1 tablespoon plus 2 teaspoons extra-virgin olive oil, divided
• 1/2 teaspoon sea salt
• 1/4 teaspoon freshly ground pepper
• 1 1/2 cups thinly sliced purple onion
• 2 cups wild mushrooms, thinly sliced (your favourite type)
• 1 cup crumbed goat cheese
• 1 large egg white mixed with 1 teaspoon water
• 1 teaspoon chopped fresh thyme (or rosemary or 1/2 amount dry, your call)