In a large saucepot, add parsnips, turnips, carrot and enough water to cover. Cook over high heat 20 minutes. Add potatoes and continue cooking, about 15 minutes until vegetables are fork tender. Drain water and transfer cooked vegetables to a large mixing bowl.
While vegetables are cooking, in a medium skillet over medium-high heat, melt butter. Add onion and cook for 4 minutes or until onions are translucent.
Add onion mixture, milk, 1 teaspoon salt and 1/2 teaspoon pepper to the root vegetables. Beat with hand mixer until well blended with small pieces remaining.
In a large saucepot, add parsnips, turnips, carrot and enough water to cover. Cook over high heat 20 minutes. Add potatoes and continue cooking, about 15 minutes until vegetables are fork tender. Drain water and transfer cooked vegetables to a large mixing bowl.
While vegetables are cooking, in a medium skillet over medium-high heat, melt butter. Add onion and cook for 4 minutes or until onions are translucent.
Add onion mixture, milk, 1 teaspoon salt and 1/2 teaspoon pepper to the root vegetables. Beat with hand mixer until well blended with small pieces remaining.