An open pastry or sponge tart filled with fruit or a savoury mixture (4)
I believe the answer is:
flan
(Other definitions for flan that I've seen before include "Open pastry or sponge case with tasty filling" , "Open pastry filled with savouries, fruit or custard" , "dish, sweet or savoury" , "Open pastry case with savoury filling" , "Open pastry dessert" .)