I found reference to this recipe when I found it looking at a recipe book for frugal cooking in an antique shop. The recipe was very popular in the 1940's and 1950's, when food was scarce, but unfortunately, I have not been able to find the origin of the recipe. It's a main meal consisting of whole leeks in a white sauce, with crisp bacon rashes laying across the leeks, acting as a belt. I'm sure, in frugal times, that the milk may have been made with dried milk powder and the sauce thickened with just flour or cornflour.