1 pound medium carrots, thinly sliced 1/2 pound medium parsnips, peeled and thinly sliced 1/2 pound Yukon Gold potatoes, peeled and thinly sliced 1 small onion, halved and sliced 2 garlic cloves, minced 1-1/2 teaspoons minced fresh rosemary 1/2 teaspoon salt 1/2 teaspoon ground nutmeg 1 cup half-and-half cream 1/4 cup heavy whipping cream