Ham hock in mustard sauce

mashed potato 50.0% , pulled ham 18.0% , whole milk 9.0% , pea 9.0% , water 7.0% , onion 3.5% , single cream 1.8% , corn flour 0.9% , chicken 0.4% , black mustard seed 0.2% , wheat flour 0.1% , rapeseed oil 0.1% , garlic puree 0.0% , salt 0.0% , pork gelatin 0.0% , spirit vinegar 0.0% , parsley 0.0% , vegetable juice 0.0% , sugar 0.0% , white pepper 0.0%