FOR THE PASTRY
   225 g  Wholemeal plain flour
     1 pn Salt
          Good pinch of dry mustard
   100 g  Butter
    50 g  Cheddar cheese – grated
          Cold water to mix
-FOR THE FILLING-
   700 g  Onions – sliced finely
    75 g  Unsalted butter
     2    Eggs – beaten
   300 ml Natural yoghurt
     2 tb Parmesan cheese
          Seasoning
 1 For the Pastry: Rub the butter into the flour until it resembles
 breadcrumbs. Stir in the mustard and cheese. Season and bind to make
 a soft dough. Roll out, line a 9″ flan dish, and bake blind for 15
 minutes.
 2 Melt the butter in a heavy pan. Add the onions and cook very gently
 for 30-40 minutes until the onions are soft and have begun to
 caramelise.
 3 Beat together the eggs and yoghurt. Fold in the parmesan cheese.
 Pile the onions onto the pastry base. Pour the eggs and yoghurt
 mixture over. Sprinkle with grated cheese. Bake at 180c/350f/ Gas 4
 for 20-25 minutes or until piping hot. Serve with salad.
                 
                 Yields       
                1 servings                
