2 pounds russet potatoes (about 4 medium), peeled and sliced 1/2-inch thick
Salt and pepper
1/2 cup 2 percent lowfat milk, warmed
1/3 cup plus 2 tablespoon low fat sour cream
2 tablespoons unsalted butter, melted
1. Place the potatoes and 1 tablespoon salt in a large saucepan, add enough water to cover the potatoes by 1 inch, and bring to a boil over high heat. Reduce the heat to medium-low and simmer gently until the potatoes are tender but not falling apart (the tip of a paring knife can be slipped into the center of a potato with no resistance), about 15 minutes.
2. Drain the potatoes and return to the saucepan on the still-hot burner. Using a potato masher, mash the potatoes until just a few small lumps remain. Fold in the milk, sour cream, butter, Season with salt and pepper to taste and serve.
Ranch Version: At the end fold in 3 minced scallions, 2 cloves minced garlic, and 2 T fresh minced parsley.