Rustic Prosciutto and Cheese Tarts with Roasted Beets and Caramelized Onions - Prosciutto Di Parma

Ingredients

• 2 small to medium golden beets, washed
• 3 tablespoons olive oil
• 2 medium onions, peeled and sliced
• 1/8 teaspoon salt
• 1/4 pepper
• 1 teaspoon fresh thyme leaves
• 1 sheet frozen puff pastry, thawed
• 1 large egg, beaten
• 1 teaspoon fennel seeds
• 8 slices Prosciutto di Parma, cut in half
• 1/3 cup crumbled goat cheese
• 1/3 cup chopped pistachio nuts (unsalted)