These expert tips for how to roast vegetables come straight from our Test Kitchen. What temperature is best for roasting vegetables? The best temperature for roasting vegetables is around 400 to 425F.

Preheat the oven to 375°F. Cut off the top 1/4 inch of each garlic head to reveal the cloves. Place up to 4 garlic heads, cut side up, on a piece of aluminum foil.