Pizza Dough - In a bowl mix together all the ingredients and knead into a dough with required quantity of water. Cover and keep aside for 15-20 minutes.
Instant Pizza Sauce - In a small bowl mix together all the mentioned ingredients and keep aside.
Divide the dough into 2 portions. Roll out each portion into a round disc and pierce with a fork all over.
Spread the pizza sauce, followed by cheese, sliced mushroom, rosemary, chili flakes, oregano and a drizzle of 1 tsp. oil.
Bake in a preheated oven at 200 degrees C. for 15 minutes or till the cheese melts. Transfer to a serving plate, cut as desired and enjoy.