What are common mistakes when making Roasting?

Question

Accepted Answer

Overcrowding — the single most common roasting failure. Twenty Brussels sprouts on a pan that fits twelve means ten of them steam instead of caramelise. The result: pale, soft, slightly bitter instead of deep brown, crispy, sweet. Not preheating the oven — putting food in a cold or warm oven means the first 15 minutes are spent heating up, during which time the surface steams instead of sears. Preheat fully — 20 minutes minimum for most ovens. Opening the oven constantly — every time the door op