Purée de haricots verts au beurre

• 3 tablespoons long-grain white rice
• 2 pounds (900 g) fresh green beans

Add the rice to 3 quarts (3 L) of boiling water and simmer it for 12 minutes, until it is just beginning to be tender, stirring once or twice. Then add the green beans, return to a boil, and add <