Sam when I was having trouble getting DD to eat dinner, I'd make sure there was something on her plate that she absolutely loved. Our rule is you need to try the other things on your plate before you eat the thing you love. At first she'd nibble at one or two things then eat the thing she liked, but now (at 6yo) she eats the things that are least favourite first, and eats her favourite thing last. Most nights, we have a clean plate (although she still has major issues with plain meat)