FYI: This is a very old recipe, bread sauces go back to Medieval times though stock was used as a base more often than milk. Thick sauces were required then because trenchers (plates made of dried bread) would have gone soggy otherwise. Sauces thickened with flour or eggs would not work for that as they would either glue or custard respectively!
OK, the recipe:
Begin by putting ¾ of a pint of whole or Jersey milk into a basin along with a small onion that has been halved and studded with 3 or 4 cloves. Place the basin over simmering water and keep the milk just below boiling point for as long as possible so that it can be infused with the flavours. Whilst that is going on use a food processor to make 4 ounces of white breadcrumbs. Take out the onion and cloves and whisk in the breadcrumbs until it is thick. The suace will thicken up after a few minutes, but if it’s a bit on the thin side make some more breadcrumbs and whisks them in. Season the sauce with mace or nutmeg (or both), salt, white pepper and a pinch of Cayenne pepper. Lastly, enrich the sauce with 1 ½ ounces of butter or 2 tablespoons of cream (or a bit of both). Pour into a ‘sauce tureen’ and add an extra sprinkle of Cayenne, says Griggers.
#123 Bread Sauce – 9/10. I loved this; creamy, rich, but not sickly at all. I’ve made it before, but this definitely the best recipe for it so far. The old fashioned spices really made it work for me.