Krakus Herring Fillets in Mustard Sauce

Herring fillets, mustard (water, mustard seeds, spirit vinegar, salt, spices, natural flavoring), water, rapeseed oil, sugar, spirit vinegar, modified starch, salt, stabilizers: locust bean gum, sodium alginate, guar gum; onion powder, whey powder (milk), skimmed milk powder, spices, yeast extract