Peas à la Française

Procedure

1. Heat the butter in a saucepan. Add the onions and sauté lightly.
2. Add the peas, lettuce, parsley, salt, and sugar. Cook over moderate heat, stirring a few times, until the vegetables begin to steam.
3. Add the stock or water. Bring to a boil, cover, and simmer over low heat or in the oven until peas are tender.
4. Stir in a litt