Mushroom, Leek + Aged Cheddar Quiche – HOPSON GRACE

Ingredients

• 1 tbsp unsalted butter or olive oil
• 5 large eggs
• ½ cup cream, whipping or light
• 1 package mixed mushrooms (400g), sliced
• 1 leek, white part only, in ribbons
• ½ cup aged cheddar (or gruyere, goat cheese or parmesan), grated
• ½ tsp kosher salt
• Freshly cracked black pepper, to taste
• ½ tbsp Dijon mustard