Place the mozzarella cheese slices onto the sourdough bread. Top with sliced tomatoes. Season with salt and pepper.
Top with the shaved parmesan, asiago, romano cheeses. Sprinkle a pinch of crushed red pepper flakes.
Place the pizza toast in the air fryer basket. Bake for 7 minutes on 350° F.
HOW TO MAKE PIZZA TOAST IN THE OVEN
If you are using an oven for the pizza toast, preheat the oven to 400°F.
Spray a baking sheet with non-stick cooking spray and space the bread slices out on it. Bake the bread slices for 5 minutes until just starting to toast.
Remove toasted bread from oven and top with mozzarella cheese, sliced tomatoes and parmesan cheese blend
Bake for 8 to 10 minutes until the cheese is melted.