Saute or bake chicken breast, cool. Cut chicken into ¼-inch thick strips.
Spray or grease a 12-inch pizza pan or baking sheet.
Place the pizza crust on the pizza pan.
Place tomatoes, salt, and basil in a bowl.
Saute onions and garlic briefly in the olive oil and add them to the tomatoes, salt, and basil.
Spread the tomato mixture over the top of the crust.
Lay the chicken strips on top of the tomatoes.
Top with Fontinella and mozzarella cheeses.
Add the sliced mushrooms and sprinkle with Parmesan cheese.
Bake at 450 degrees for 8 minutes, or until cheese is melted and the crust is piping hot.
Recipe Tips
For the most authentic flavor, try to find true Fontinella cheese, which has a distinctive sweet and creamy profile. If unavailable, Asiago makes an acceptable substitute, though the flavor will be slightly more sharp. While a pre-baked crust works perfectly for weeknight ease, homemade pizza dough creates an even more impressive final result. The key to this sauce-less pizza is allowing the tomato mixture to slightly cook down before spreading it on the crust – this develops flavor while ensuring the pizza won't be dry.