When you are ready to fill the potatoes, preheat your oven to 200C/180C fan/400F/gas 6. Grate the cheese, and add 200g of it to the cold potato along with the sour cream. Chop the spring onions and add to the potato, with the salt, pepper and worcestershire sauce.
My daughters favorite. Use cream cheese 8 oz size instead of the sour cream. Double the recipe as These make excellent left over side dishes. Oven bake potatoes instead of microwave. The Ultimate Twice Baked Potatoes