halfway through. Let rest for 10 minutes before serving. Cut the strudel in 1-inch-thick slices and top with yogurt. Per hors d'oeuvre: 64 calories, 1 gm protein, 5 gm carbohydrates, 5 gm fat, 10 mg cholesterol, 2 gm saturated fat, 61 mg sodium Andrew Schloss is a cookbook author whose "Dinner's Ready," written with Ken Bookman, was published earlier this year by William Morrow. The Washington Post 12/20/95