Rub in butter until mixture resembles fine breadcrumbs.
Add wine gradually, mixing well to form a firm dough.
At this point, you could divide the dough in half and freeze one half for future use.
Knead the dough quickly into a ball, wrap in clingwrap, refrigerate one hour.
Roll out thinly on a lightly-floured surface and use to line six lightly-greased
pastry rings, pressing down lightly with your fingers.
Prick bases with a fork.
Filling:
Place all ingredients, except tomatoes and pepper in a bowl, mix well. Spoon equal
amounts of Filling into each pastry case, arrange tomatoes on top. Sprinkle with black
pepper.
Bake at 170 ° C, 30 minutes or until golden brown.