Score edges of ham slice; place in 2-quart (12 x 7-inch) glass baking dish.
Combine apricot juice, brown sugar, cornstarch, vinegar and nutmeg in small glass mixing bowl, pour over ham.
Top with apricots and dot with butter.
Microwave on medium for 20 to 25 minutes, uncovered, or until ham is hot and sauce thickened.
Let stand 5 minutes before serving.