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, to taste

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.