Boil pasta in salted water until tender, then drain and set aside.
Soften chopped onion and garlic in oil, stir in a spoonful of flour, and cook one minute.
Whisk in milk slowly and simmer until the sauce thickens, then season with salt and pepper.
Add shredded cooked chicken and the pasta, and warm everything through.
Shred the lettuce, stir it in off the heat so it just wilts, and serve at once.
Nothing to buy.
About 25 minutes.
This page lists in search once 20 different shelves have held the three together and 10 people have picked between the plans. Today it is seeded from 4 of the 30 pilot shelves, so it stays out of the index and says so.
Have these on your own shelf? Photograph it and the plans start from everything that is there.