You have to follow specific measurements for the sauce or else there will not be enough to top off. The same goes for the mozzarella. I definitely did not use as much ricotta cheese since we are not big fans of it. I used spicy turkey Italian sausage a package of thawed spinach (make sure to squeeze water out). I omitted the mushrooms, not a fan of it. Overall, this recipe was okay. Felt like something as off - maybe more sauce and adding more spices like garlic powder, oregano, etc.