Brown the lamb in a heavy casserole. Push the lamb to one side of the dish. Add onion and garlic and saute until soft. Stir in 1 cup water, lemon juice, bay leaf and salt. Cover. Simmer 3 hours or un til very tender. Remove meat and keep hot. Blend potato starch with remaining water. Stir into pan liquid. Cook, stirring constantly, until gravy thickens and boils for 1 min. Remove bay leaf and ser ve.
