Cost per Serving:
1. Pierce each potato with a fork 3 to 4 times on each side. Wrap each potato in a damp paper towel. Microwave at HIGH 8 minutes, turning after 4 minutes. Cool slightly. Cut potatoes in half; scoop pulp into a bowl. Mash pulp.
2. Stir butter, milk, sage, Parmesan cheese, and salt into potato pulp.