Dinners to whip up in one tin, minimising washing up and causing a delicious blend of flavours across elements in the oven. Each of these recipes takes half an hour or less to cook Cook quick, delicious and nutritious one-tin meals that take the pressure off dinner. 10 MINUTES PREP. All meals take just 10 minutes to prep, and no longer than 30 minutes in the oven. Just chop a few ingredients, pop them into a roasting tin, and kick back while the oven does the work.