In general whole chickens should be cooked for about 15 minutes per pound about 045 kg in a convection oven heated to 375F 190C. Cut the lemon s in half or quarters and shove them into the cavity with the sprig or two of thyme. Turkey Basics How To Videos Turkey Basics How To Videos Lunches Chicken Oven Honey Whole Turkey Recipes Grilled Turkey Traditional Turkey Recipes How Long to Roast a Chicken. How to convection roast a whole chicken . Its not a game changer. How long does it take to cook a whole chicken at 325. I cut up some capsicum baby potatoes and onion and even stuffed the chicken with the same and a few cloves of garlic. INGREDIENTS 12 teaspoon Kosher Salt 12 teaspoon Freshly ground pepper 12 teaspoon Garlic powder 12 teaspoon Paprika 1 tablespoon Vegetable oil 4 pounds Chicken whole. Convection oven roasted chicken. Then rub the outside of the chicken with olive oil and sprinkle liberally with salt and pepper. Rinse chicken with cold water and. Roast ...