Which one following cooking method is used to cook blanquettes of lamb?

Here's why:

* Braising involves searing the meat (lamb in this case) to create a flavorful crust, then simmering it in a liquid (usually wine or broth) with vegetables for a long time. This tenderizes the meat and creates a rich sauce.

* Blanquettes de veau is known for its tender, melt-in-your-mouth veal and creamy sauce. The long, slow cooking process of braising achieves this.

While other methods like roasting or stewing could be used, braising is the traditional and most common way to cook blanquettes.