I was finding mozzarella cheese boring and to a point, just not as good as it used to be. That led me to replacing ~ 80% of it with sharp cheddar..I had two cheddars that I cut up into sugar cube size, ~ 20
pieces and spaced them evenly over the top of my 14" pie.. The pie consisted of a sourdough crust, EVOO, tomato sauce, sliced button mushrooms, caramelized onions, a tomato - sliced & quartered, a sparse
amount of shredded mozzarella and the cheddar.
The cheddar took the boring taste away and added a wonderful new flavour profile to the pie.