Microwave broccoli & cheese sauce as directed on box.
In bowl, mix broccoli & cheese, ham, onion and 1/2 cup of the cheese. Spoon into ungreased 9-inch round (2-quart) glass baking dish.
Open can of dough; do not unroll. With serrated knife, cut dough into 1-inch slices. Cut each slice in half; place cut side down on hot ham mixture. Sprinkle with remaining 1/4 cup cheese.
Bake at 375°F 20 to 25 minutes.