Caramalized Onion Quiche Recipe

Ingredients

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• 1 pie crust shopping list
• 2 tablespoons olive oil shopping list
• 2 large red onions diced shopping list
• 1 teaspoon salt shopping list
• 1 teaspoon freshly ground black pepper shopping list
• 1 teaspoon balsamic vinegar shopping list
• 1/2 cup milk shopping list
• 1/2 cup heavy cream shopping list
• 3 large eggs shopping list
• 1/4 teaspoon nutmeg shopping list
• 1-1/2 cups gruyere cheese grated shopping list