Prepare the pizza dough so that it's finally sitting on a baking tray lined w/ baking parchment.
Drain the tomato pulp & discard the water. Add olive oil & dried herbs.
Grate the gruyère.
Chop the ham & the mushrooms.
Pluck the thyme leaves.
Chop the mozzarella.
Dsitribute the tomato mess on the pizza pastry.
Sprinkle w/ dried sage.
Add the grated gruyère.
Add the ham & the mushrooms.
Add the fresh thyme leaves.
Add the chopped mozzarella.
Bake in the oven for about 30 min at 175° C fan.