Preheat the sheet pan for extra crispiness

Place your empty sheet pan in the oven while it preheats. When the oven is hot, carefully remove the pan, spread the oiled vegetables on the hot surface, and return to the oven. The sizzle when vegetables hit the hot pan is the sound of instant crisping.

Why It Works

A preheated pan sears the bottom of the vegetables on contact, creating a golden crust from the very first minute. This is the same principle behind searing meat in a hot skillet.

Tips

• Use a metal sheet pan (not glass or ceramic) for this technique
• Be careful handling the hot pan — use oven mitts and place on a heat-safe surface
• This works especially well for potatoes, Brussels sprouts, and root vegetables
• Line the pan with parchment before preheating — it can handle oven temperatures up to 450°F