Lettuce Soup

• 1 lettuce (keep the heart for sandwiches), or a few small lettuces from thinning the rows
• 1 large onion
• 1 large

Wash the lettuce and break up the leaves; chop the onion and potato roughly. Melt the butter in a large pan and soften the lettuce and onion in it without browning. When they are soft add the potatoes and the boiling stock. Simmer uncovered for 20-30 minutes until the potatoes are cooked; sieve, mouli or liquidise for just a few seconds, moistening with milk. Add the rest of the milk and taste