Mouettes d'Arvor Mackerel Fillets w/ Creamy Mustard Sauce

mackeral fillets, mustard sauce (water, Dijon mustard (water, mustard seeds, vinegar, salt, preservative: sodium bisulphite), heavy cream (cream, stabilizer: carrageenan), sunflower oil, rice starch, white wine vinegar, salt alcohol vinegar, garlic, spices, Muscadet white wine, artificial flavor, stabilizers: guar gum and locust bean flour).