Preheat the oven to 400 degrees F.
Arrange the pears cut side up in an 8-inch square glass baking dish
the apple juice and sugar in a small heavy saucepan
over medium-high heat until the sugar dissolves. Whisk in the butter. Pour the sauce over the pears. Bake until the pears are crisp-tender and beginning to brown, basting occasionally with the juices, about 35 minutes.
Spoon the pears onto plates. Top with ice cream
with any juices and serve.
can also be served frozen. To do so, cool the pears, then place them in the freezer until frozen solid, about 8 hours.