Chicken Crown with Sage & Onion Gravy

chicken breast 73.0% , water 14.1% , onion 6.5% , corn flour 3.2% , chicken broth 1.6% , white sugar 0.4% , brown sugar 0.4% , rice flour 0.4% , corn starch 0.2% , yeast extract 0.1% , salt 0.1% , garlic puree 0.0% , caramelised sugar syrup 0.0% , garlic 0.0% , onion 0.0% , marjoram 0.0% , sage 0.0% , parsley 0.0% , rapeseed oil 0.0% , black pepper 0.0% , thyme 0.0% , white pepper 0.0% , sage 0.0% , flavouring 0.0%