How do you cook a roast in a electric roaster?
How to Use a Roaster Oven to Cook a Chuck Roast Preheat the roaster oven at 300 degrees F for 15 minutes with the lid on. Prepare the vegetables. Cook the roast at 300 degrees F for 15 to 30 minutes per pound, depending on whether you want rare, medium or well-done beef. Remove the roast to a serving platter.