Garlic-Mashed Turnips and Potatoes

1 pound turnips, peeled and cut into 1/2-inch pieces

1 pound potatoes, peeled and cut into 1/2-inch pieces

4 cloves garlic, peeled

3 tablespoons butter

2 tablespoons sour cream or plain yogurt

Salt and pepper

In a large pot of salted boiling water, cook the turnip, potato, and garlic for 10 minutes, or until the vegetables are tender. Drain and puree the vegetables and garlic through a food mill. (A food processor is not recommended, as it can turn potatoes very starchy.) Beat in the butter and sour cream and season with salt and pepper.

(Source: http://www.sallys-place.com/food/columns/ferray_fiszer/turnips.htm)