Easy Quiche Lorraine Recipe: Even Mary Berry Would Love It!

Ingredients

• 1 (9-inch) pre-made frozen pie crust, thawed
• 6 slices bacon, cut into 1/4-inch lardons (approx. 170g)
• 1 tablespoon unsalted butter (15ml)
• 1 small onion, finely chopped (approx. 100g)
• 4 large eggs (approx. 200g)
• 1 1/2 cups heavy cream (360ml)
• 1/2 cup whole milk (120ml)
• 1/4 teaspoon freshly grated nutmeg (1.25ml)
• Salt and freshly ground black pepper to taste
• 1/2 cup grated Gruyere cheese (optional) (approx. 50g)