Stolen feeders/Ground feeding

Sadly came in from work yesterday morning,to find I'd had 4 feeders stolen. After 2 years of nothing being touched,I've had 9 stolen this year. Have put everything that's left,away in my shed,apart from a wall feeder and a hanging table on my house wall. So I thought I'd try just laying food out on the lawn,which I know isn't ideal,but what can I do. Any tips on ground feeding? I'd use trays,but worried that they'd just disappear too.