German here, too.

Deep Dish Pizza is not Pizza.

I make pizza from scratch regularly, 1,50 Euro per Pizza is absolutely doable. Even with a topping or two. My personal favorite is pepperoni (the vegetable, not the sausage), which is cheap. My kid likes salami best. These two together will cost me about 2,60 Euro w/o counting the energy for the oven. That’s 1,30 per serving.