Spinach, Caramelized Onion and Feta Quiche

Bahan-bahan (8 porsi)

• 2 teaspoons olive oil
• 3 cups chopped onion
• 1 teaspoon granulated white sugar
• ½ teaspoon salt
• 2 cups frozen Southern-style hash brown potatoes, (thawed)
• One 11-ounce can refrigerated soft breadstick dough
• One 10-ounce package frozen chopped spinach ((thawed, drained, and squeezed dry))
• 1 cup nonfat milk
• 3 large egg whites
• 2 large eggs
• 1¼ cups (5-ounces) crumbled feta cheese