This recipe will make 10 jumbo muffin-tin sized tarts, or you could make one large flan.
Beat together:
60g of unsalted butter, melted and cooled
3 tsp of pure vanilla essence
225g of castor sugar
2 large eggs
Stir in:
250g of plain flour
1 cup of chopped dark chocolate (Whittaker's 72 per cent Cocoa Dark Ghana is good)
1 cup of chopped nuts (I used a mix of macadamia, walnut and cashew.)