Scrub the skins to remove dirt and prick with a
skewer several times. Place potatoes well apart on a
rack and bake at 350F (180C) for 1 hour or until
tender (or microwave on HIGH 10 minutes). Let cool.
When
potatoes are cool enough to handle, cut in half and
scoop out the pulp, leaving a 1/2 inch (1cm) thick
shell. Mash the potato pulp and set aside to use in
filling of your choice.
Brush potatoes inside and out with oil and arrage on
a greased oven tray, cut side up. Bake at 400F
(200C) for 10 minutes.