This is a great way to get the oven effect when you want to roast whole poultry or get the oven-baked effect for foods like fish. Once the coals are ready, spread them evenly on the outside edge of the charcoal grate with tongs. Or you can push the coals to one side of the grill, leaving one side free of charcoal. Position the cooking grate over the coals and allow the grate to preheat for a few minutes. Place your food right in the center. Close the lid and open the lid vent. The heat from the charcoal will rise and reflect off of the surfaces of the lid and circulate to cook the food evenly from all sides. If you need the grill to be hotter, just close the vent.