The one in the first page is a Cinco but this is how to make a Quatro Formagi. Very simply and if you can do this you can make a Cinco after some practice.
If you have a wooden board or a skillet for example make sure to put the pizza on the wooden board or skillet before topping. If you slide with a metal peel, use a bit more flour than usual so it's not tacky and sticky to slide on or if it's too hard also put on the peel before topping.
There really is no set ingredients, just use what you like and it's your choice. Great to make for pizza for friends and family and a really special treat. You can use Ricotta as filling too and some powdered sugar on top, after its cooked you can add strawberries and bananas on top and add Nutella from a plastic squeeze bottle to the stuffed Ricotta part and serve it as a desert but that is a bit harder to make.
Check it out this is just the standard, sorry for the weird angles and stupid hands. It was just hard to do it with one hand and use the camera at the same time.