Madeleine L'Engle:

When I start working on a book, which is usually several years and several books before I start to write it, I am somewhat like a French peasant cook. There are several pots on the back of the stove, and as I go by during the day's work, I drop a carrot in one, an onion in another, a chunk of meat in another. When it comes time to prepare the meal, I take the pot which is most nearly full and bring it to the front of the stove. So it is with writing.

Walking on Water, p. 215