Prick potatoes several times with a fork. Place on a piece of paper toweling and cook at 100 percent for 11 minutes, or until tender, in a 650- to 700-watt oven.

Remove potatoes from oven. When cool enough to handle, halve each potato and scoop out flesh with a spoon. Pass through a ricer or place in a bowl and mash with a potato masher. Stir in oil and salt and pepper to taste. Serve hot.