Le Creuset Casserole is a modern icon. The saucepan heats up quickly distributing the heat evenly. Le Creuset uses remium-grade stainless steel and aluminium are bonded together to form a 3-layer material that spreads heat evenly and gently through the entire pan. ooking on a medium or low heat gets the best results - even for frying and searing. Let the product heat up gradually for great tasting food that's cooked evenly.