Cod Mornay, Mash & Peas

mashed potato 52.4% , cod 23.8% , pea 11.9% , skimmed milk 6.0% , whole milk 3.0% , medium fat hard cheese 1.5% , single cream 0.7% , medium mature cheddar 0.4% , corn flour 0.2% , onion 0.1% , Gelling agent 0.0% , lemon juice 0.0% , garlic puree 0.0% , fish 0.0% , salt 0.0% , mustard seed 0.0% , sugar 0.0% , spirit vinegar 0.0% , sunflower oil 0.0% , white pepper 0.0% , pepper oil 0.0%