Using ingredient prebaked quiche shell

Golden Onion Quiche

• 8 prebaked quiche shell
• 3 eggs
• 3 ozs gruyere cheese (freshly grated)
• 450 gr onions (sliced)
• 240 ml cream (heavy)
• 60 gr butter (unsalted)
• 30 ml safflower oil
• 16 gr flour