In a bowl, mix together flour, salt, yeast.

Add oil and enough water to make a soft dough.

Knead the dough for 5-10 minutes until elastic.

Cover and set aside for 1 hour or until double in volume.

Slice onions, peppers and tomatoes into thin long slices.

Preheat oven to 250°C.

Punch the dough and shape it into a thin rectangle on a greased baking tray.

Top it with sliced onions, peppers and tomatoes.

Sprinkle salt and pepper on top.

Bake in preheated oven for 20 - 25 minutes or until golden.

Slice it up and serve hot.