Emmi Gruyère and Caramelized Onion Tart with Apples and Sage in a Buckwheat Crust - Emmi USA

Ingredients

• For Crust:
• ¼ cup plus 2 tablespoons whole wheat flour
• ¼ cup buckwheat flour
• ¼ teaspoon kosher salt
• 1 ½ teaspoon potato starch
• 4 tablespoons butter, chilled and cut into little cubes
• 3 to 4 tablespoons ice cold water
• AP flour for work surface
• For Filling:
• 2 tablespoons olive oil
• 2 yellow onions, sliced thin
• 1 teaspoon kosher salt
• ¼- ½ teaspoon freshly cracked black pepper
• 1 tablespoon butter
• ¼ cup dry white wine
• 1 cup Emmi Le Gruyère AOP, grated
• 1 medium apple, cut in half, cored and sliced 1/8” thick
• Approximately 4-6 large, fresh sage leaves, finely chopped, plus some little ones to garnish
• 1 large egg
• ¼ cup heavy cream