This steamer insert is smartly designed to keep things quick and easy. Just take your favourite 24cm casserole. Fill the casserole at least half full of water, put the steamer insert on top and you're good to go! The double-walled construction allows steam to elevate, so your food gets steamed evenly, from top to bottom! You can even prepare an entire meal: simply stack two or three steamer inserts on top of wach other and let the magic happen!