Yes, you can use aluminum foil to make a makeshift roasting pan for vegetables or meat. Simply take a large piece of aluminum foil, fold it in half, and then shape it into a bowl-like form. Ensure the foil is thick enough to hold the weight of the food and has enough depth to prevent juices from leaking out. This method is convenient for easy cleanup and can be used in the oven or on the grill, but always monitor the cooking to prevent the foil from burning.