Garlic Bread Strata | Bertolli Olive Oil

Ingredients

• Bertolli Olive Oil Spray
• 2 tbsp Bertolli Organic Extra Virgin Olive Oil
• 1 brown onion, peeled, finely chopped
• 270g store-bought garlic bread slices
• 150g grated Gruyere cheese (substitute Tasty cheese)
• 8 eggs
• 375ml milk
• 375ml thickened cream
• ¼ cup chopped parsley, plus extra leaves to serve
• 1/3 cup grated parmesan
• Sea salt and freshly cracked black pepper