Five Cheese Toastie

White sourdough bloomer (wheat flour [WHEAT flour, calcium carbonate, iron, niacin, thiamin], water, RYE flour, SPELT (WHEAT) flour, WHEAT flour, salt, durum WHEAT flour, durum WHEAT semolina, yeast, antioxidant: ascorbic acid), béchamel sauce (whole MILK, water, single cream (MILK), American style mustard [water, spirit vinegar, MUSTARD flour, MUSTARD bran, cornflour, salt, turmeric], cornflour, salted butter [butter (MILK), salt], wheat flour [WHEAT flour, calcium carbonate, iron, niacin, thiamin], salt, white pepper, ground bay leaf), mozzarella full fat soft cheese (9%) (MILK), mature Cheddar cheese (6%) (MILK), EatleanTM low fat cheese (4%) (MILK), smoked Cheddar cheese (3%) (MILK), American style mustard (water, spirit vinegar, MUSTARD flour, MUSTARD bran, cornflour, ground turmeric, salt), Emmental cheese (1.1%) (MILK), cornflour, potato starch.