Chicken and Ham Gratin

chicken 51.4% , milk 24.3% , potato 12.2% , cream 6.1% , cheddar 3.0% , wheat flour 1.5% , wheat flour 0.8% , E170i 0.4% , iron 0.2% , E375 0.1% , thiamin 0.0% , smoked ham hock 0.0% , pork 0.0% , salt 0.0% , Antioxidant 0.0% , E301 0.0% , Preservative 0.0% , E250 0.0% , E249 0.0% , onion 0.0% , white wine 0.0% , spinach 0.0% , rapeseend Oil 0.0% , butter 0.0% , parsley 0.0% , mustard water mustard seeds 0.0% , vinegar 0.0% , salt 0.0% , chicken broth 0.0% , chicken 0.0% , potato 0.0% , water 0.0% , yeast extract 0.0% , salt 0.0% , chicken fat 0.0% , white pepper 0.0% , sea salt 0.0%