Ingredients

2 pounds rutabaga, peeled and cut into 1/2-inch pieces 

2 pounds sweet potatoes, peeled and cut into 1-inch pieces 

Kosher salt and freshly ground pepper 

4 tablespoons unsalted butter 

2 tablespoons minced garlic (from 5 to 6 cloves) 

2 tablespoons finely chopped fresh sage leaves 

1/2 cup heavy cream 

Preparation

In a pot, combine rutabaga and sweet potatoes; cover with water by a few inches and season generously with salt. Bring to a boil, then reduce heat to medium and cook until easily pierced with the tip of a knife, about 15 minutes. Drain.

Return pot to medium heat; add butter. When it melts, add garlic and sage; cook 1 minute. Add cream; bring to a simmer, then remove from heat. Return rutabaga and sweet potatoes to pot; mash to desired consistency and season with salt and pepper. Serve.