In traditional pesto pasta recipes, the cheese typically used is Parmesan or Pecorino Romano. These hard and flavorful cheeses add a rich and savory taste to the pesto sauce. However, when it comes to a pesto pasta with white sauce on pizza, the cheese selection can vary depending on personal preference and regional variations.

Some common cheeses that can be used in pesto pasta with white sauce on pizza include:

  1. Mozzarella: Mozzarella is a popular choice for pizza due to its mild and creamy flavor. It melts beautifully and adds a gooey texture to the dish.

  2. Fontina: Fontina is a semi-soft cheese with a nutty and buttery flavor. It melts well and adds a rich and creamy taste to the pizza.

  3. Provolone: Provolone is a semi-hard cheese that has a sharp and slightly smoky flavor. It melts nicely and can add a tangy kick to the pesto pasta pizza.

  4. Gouda: Gouda is a Dutch cheese that comes in various flavors, including smoked and aged variations. It has a creamy and slightly sweet taste, and when melted, it adds a unique twist to the dish.

It's worth noting that the choice of cheese can vary depending on personal preference and regional culinary traditions. Ultimately, you can experiment with different types of cheeses to find the combination that suits your taste best.