Root Vegetable Bake (mash) (weight Watchers) Serving Size : 4 * 1 Small butternut squash -- Peeled Seeded And Cubed * 1 Small celeriac or celery root -- Peeled And Cubed * 1 carrot -- Peeled Ends Removed -- Chopped * 1 Medium All-Purpose Potato -- PeeledAnd Cubed * 1/2 Cup Chopped Peeled yellow turnip or rutabaga * 1 Onion -- Peeled Ends Removed -- Chopped * 1/2 Cup Low-Sodium chicken broth * 1 Teaspoon Reduced-Calorie margarine --Plus * 1 Tablespoon Reduced-Calorie margarine * 2 Tablespoons Skim milk * 1/4 Teaspoon salt * 1/4 Teaspoon Ground white pepper Saucepan.