Batrum Cornish Pasties

Mike's Gran's recipe mixed in with Heather's family pastry:

"I don't have the specific pastry Big Mom used, so will give you the
Nicolson one which came from my Gran, its lovely and light, without all
the effort of traditional flaky pastry. Heather."

Soda water pastry:
1lb flour (2.5 cups)
1/2lb butter
Pinch salt
1 small bottle chilled soda water(about a cup)

Grate chilled butter into flour with coarse grater
Use 2 forks to mix slightly, pour the iced water over and mix again.
Roll out once only, wrap in greased paper and refrigerate until required

Filling:
Rump steak cut into small cubes
Potatoes, cut into cubes
Chopped onion
Freshly ground black pepper
Salt

Fill pastry rounds, close by wetting the edges with wet fingertips,
bring edges together pastie style and seal, brush with egg & bake at
200?C (400?F) for about 40 minutes