Preheat oven to 200 degrees/gas mark 6

Heat the oil in a pan, and fry the onion and garlic until softened

Pour over the chopped tomatoes and sugar, and bring to the boil

Reduce the temperature, season with salt and pepper and leave to cool

Place pastry onto a flat surface and roll flat

Cut into a heart shape with a knife, and place onto a slightly oiled baking tray

Spread over the cooled sauce, leaving a 1cm rim around the outside of the pastry

Top with mozzarella, olives and sundried tomatoes

Brush egg over the exposed edge of the pastry

Bake for around 10 minutes or until the pastry is crisp and golden

Serve warm scattered with ripped basil leaves.