Caramelised Onion Beef Burger

beef 81.0% , red onion 9.8% , dark muscovado sugar 4.6% , sugar 2.3% , Caramelised onion 340ge seasoning 1.1% , rice flour 0.6% , cider vinegar 0.3% , yeast extract 0.1% , onion 0.1% , spirit vinegar 0.0% , onion 0.0% , beef broth 0.0% , salt 0.0% , beef extract 0.0% , corn flour 0.0% , rapeseed oil 0.0% , water 0.0% , potato starch 0.0% , chives 0.0% , onion 0.0% , tapioca 0.0% , rapeseed oil 0.0% , yeast 0.0% , Stabiliser 0.0% , dextrose 0.0% , sugar 0.0% , black pepper 0.0% , psyllium 0.0% , corn starch 0.0%