Cover the bottom of the pan with foil and bring half way up pan to keep batter from leaking onto oven floor. (jennadish.com)
When that sheet pan full of vegetables hits the super-heated oven floor — which, in most ovens, is where all of the heat comes from — they get an immediate hard sear which jump - starts the caramelization process, much as they would in a pre-heated sauté pan. (bonappetit.com)
Place a thick rimmed cookie sheet or cast iron pan on oven floor or lower shelf. (chewswise.com)