Crumble the yeast in a bowl.
Add the Lukewarm water and stir the yeast until it is lump free.
Add the oil and the salt and mix together.
Add the flour bit by bit and make a lightly sticky pizza dough.
Cover the bowl with a towel and let it rest for minimum 1 hour.
Start the oven at 220 degrees Celsius.
Divide the dough in 2 parts. On baking papers roll out the dough parts into round pizza bottoms.
Add the pizza sauce on top of the pizzas.
Cut the onion and mushrooms in small pieces. Grate the cheese and the ham. Add it all on top of the pizza.
Sprinkle the spices on top of the pizzas.
Place one pizza in the middle of the oven for 20 minutes. Take it out and serve it warm. Place the second pizza in the oven for 20 minutes. Take out the second pizza and serve it warm.