Dissolve yeast in lukewarm water and leave aside for 15 minutes until foamy.
Mix together all the dough ingredients including yeast in a bowl and knead with required water, set aside for half an hour.
Heat oil in a frying pan and fry onions till golden, add tomatoes, garlic and salt.
Cook till tomatoes are soft, season with oregano and remove sauce from flame.
Roll out pizza dough and spread on pizza pan, layer with sauce and topping ingredients.
Bake pizza in pre-heated oven at 200°c for 12 minutes.