[header] How to make a roasted vegetable salad [title] Preheat the oven. [step] Preheat the oven to 220ºc , 425ºf or gas mark 7. [title] Roast the potatoes. 
[step] Into one of the roasting trays pour half the oil, add the potatoes and stir to coat them evenly with oil, salt and pepper to season. Place on the top shelf of the oven for 20 minutes.