Sweetbread Soup

• 2 or 3 calves’ sweetbread
• stock (2 pints)
• 2 onions

Soak the sweetbread in cold water for 3 or 4 hours, changing the water occasionally. Put them in a saucepan of cold water, and bring to the boil for exactly 2 minutes. Remove from the water and lay them on a clean cloth to drain. With a knife, carefully remove bits of skin and veins, being careful not to damage the thin membrane which covers the sweetbread.

Slice the ve