For the dough, dissolve yeast in approx. 180 ml lukewarm water. Mix flour, 1/2 tsp. sugar, 1/2 tsp. salt and oregano. Add 1 tablespoon of oil and mix with the dough hook of the hand mixer, letting the yeast water run in. Knead everything to a smooth dough. Cover and leave to rise in a warm place for about 40 minutes
Wash basil, shake dry and finely chop the leaves of 1 stalk. Mix strained tomatoes, chopped basil and tomato paste, season with salt, pepper and sugar. Pluck the mozzarella into pieces. Wash, clean and slice the zucchini and tomatoes. Wash and clean the aubergine, cut it in half lengthwise and cut it into slices. Brush the grill pan with oil. Grill the aubergine and courgette slices in the pan for 3-4 minutes while turning. Remove from the pan, season with salt and pepper.
Clean spring onions and cut into rings. Roll out the dough on a floured work surface (22-24 cm Ø). Spread the pizza with tomato sauce, spread fried vegetables, onion rings and tomato slices on top. Pluck the cheese and spread it on top. Bake the pizza in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 15 minutes on the bottom shelf. Halve the ham slices. Remove the pizza, cover with ham and garnish with basil