The Irish classic!
2 pounds potatoes, peeled and cubed
2 pounds rutabaga or turnips, peeled and cubed
¼ cup butter, softened
1 teaspoon mustard powder
1 bunch scallions, finely chopped
Sea salt and fresh ground pepper
1. Place potatoes and rutabaga or turnips in a large pot; cover with water.
2. Bring to a boil. Cook until tender, about 15 minutes. Drain. Add butter and mustard powder; mash until well incorporated.
3. Stir in the scallions, and then season to taste with salt and pepper.