Haddock & Spinach Mornay

haddock 50.0% , milk 23.0% , spinach 23.0% , CIABATTA 2.0% , cheddar 1.0% , butter 0.5% , Plain Wheat Flour 0.3% , cream 0.1% , egg yolk 0.1% , fish stock 0.0% , salt 0.0% , maltodextrin 0.0% , yeast extract 0.0% , rapeseed oil 0.0% , parsley 0.0% , mustard 0.0% , white wine vinegar 0.0% , water 0.0% , mustard seed 27.0% , honey 0.0% , salt 0.0% , brown MUSTARD husk 2.0% , natural spice flavouring tarragon 0.0%