1 Sheet of puff pastry
Ripe tomatoes
Olives or Anchovies
Onions
Feta cheese
Splash of Olive oil

Thinly slice the onion and cook in the oil until soft. (you could also add a little garlic to the onion)
Spread the cooked onion on the pastry. Leave about a 5cm gap around the edge.
Slice the tomatoes and place on the onion.
Slice the olives and spread over the top. (if you use anchovies do not use too many)
Break up the feta and place on top.
Bake in oven at about 180-200 for 20 minutes or until pastry is golden.
If you cut half way through the pastry about 5cm from the edge it will help the edge to rise, otherwise you could fold the edge in to give it a double thickness