Lamb, mint and pea pasties
Use 400g potato and swap the swede for 150g frozen peas. Swap the beef for 300g diced lamb neck fillet. Stir some finely chopped mint through the filling.
Cheese and spinach pasties
Replace the swede with more diced potato. Instead of the beef, add 250g coarsely grated Cheddar or a mix of Cheddar and a crumbly tangy cheese, such as Caerphilly. Wilt 200g spinach, then refresh under cold water and squeeze out as much liquid as possible before chopping into small pieces and adding to the filling.
Sweet potato and chorizo pasties
Swap the swede for diced sweet potato and the beef for 200g sliced chorizo. Briefly fry the chorizo to release its oil, before adding it to the vegetables. For extra favour, add some chopped fresh herbs, such as tarragon or parsley.