✅ Roast Tray I Use (Amazon – paid link): br br Disclosure: Some links above are affiliate links which means I may earn a small commission if you click and buy, at no extra cost to you.br br Ninja Support: br Convection Bake, Air Roast, and Smart Finish on the Ninja Double Oven (DCT451) can be confusing. This guide explains what each one does, when to use them, and how Smart Finish syncs the top and bottom ovens.