Heat the butter and oil in a large, straight-sided sauté pan. Add the onion and sauté until soft. Do not brown (Fig. 14.2).
Add the rice and sauté until well coated with the fat.
Using a 6-oz (150-mL) ladle, add one ladle of stock to the rice. Stir the rice over medium heat until the stock is absorbed and the rice is almost dry.