Most of us know Mary Berry from her days judging the Great British Bake Off, but the Cordon Bleu-trained chef is also pretty great at devising easy dinners and lunches too.We’re already huge fans of her cheat’s lasagne and surprisingly easy upgraded cottage pie recipe, despite their unconventional ingredients. So I was willing to hear her out when I read her croque monsieur (toasted cheese and ham sandwich) recipe involved a spice I’m more used to seeing in cakes.Which is?Mary Berry includes nutmeg in the “wonderfully naughty snack, brunch or lunch”.More specifically, she adds it to the cheese sauce she places on top of the sandwich, which also contains flour, butter, hot milk and Gruyère cheese.To make the main grilled sandwich, she places melted butter on one side of two slices of bread and mustard on the other sides.She grills the bread, placing ham o