Hey, I'm wondering what kind of pan's these chef's use to sear with. These cooking programs always show them using high heat on the stove then placing the pan in the oven to finish the dish. All Clad advises to not use high heat or it will void the warrantee. How do you sear meat with medium heat? The only pan I know of that can handle high heat is cast iron or wok's. What's the big picture?