I love Greggs Chees & Onion pasties too, and can add to this post
1 Packet of Cheese an Onion Smash (Made up)
1 Packet of Batchelors Maccaroni Pasta / or Cheese and Brocolli (Made up with water)
1 Tub of quark
4 Eggs
Mix all together - cook gas mark 6 for 25 minutes
makes quite a lot. suitable for hot and cold.