how long do you cook roast vegetables
1 Technique: Roast the vegetables, uncovered, about 30 minutes, stirring once. 2  Remove the pan from the oven and add the vegetables with shorter cooking times. 3  Toss to combine and return to the oven.hoosing Your Vegetables. Best Veggies: Some vegetables especially benefit from roasting, such as onions, potatoes, carrots, beets, winter squash, carrots, and other hearty root vegetables, but most vegetables will work. Tender vegetables, such as asparagus and mushrooms, also transform in the heat of the oven.