Put the flour and 1/2 teaspoon salt in a bowl. Dissolve the yeast in 150 ml lukewarm water. Stir olive oil and water into the flour with the dough hooks of the hand mixer and work into a smooth dough with your hands.
Cover and leave to rise in a warm place for about 20 minutes. In the meantime, drain the cheese and cut into slices. Clean, wash and chop the tomatoes and mushrooms. Season tomato pieces from the package with salt, pepper and basil.
Quarter the dough and roll out round. Place on a floured baking tray and spread with chunky tomatoes. Add cheese, diced tomatoes and mushrooms. Bake in the preheated oven (electric: 225°C / gas: level 4) for 25-30 minutes.
5 minutes before the end of the cooking time, add the salmon ham and drained olives. Serve to taste, garnished with basil leaves and sprinkled with coarse pepper. Makes 4 pizzas.