Step 1

Place rutabaga, potato, 6 cups water, 1 tablespoon salt, and bay leaves in a large saucepan over high heat. Bring to a boil; reduce heat, and simmer 18 minutes or until very tender. Drain; discard bay leaves.

Step 2

Return mixture to pan. Add remaining 3/4 teaspoon salt, butter, and pepper. Mash well with a potato masher; stir in onions.