1 pizza crust (Prebaked or your own- just follow the directions for your crust.)
2 tbs butter
1 cup (or more) sliced baby bella or button mushrooms
1 1/2 cup diced precooked chicken
1/2 cup torn spinach
1 cup mozzarella cheese
(optional toppings like bacon bits and/or black olives)
Preheat oven to 400. (I sometimes like to pre-bake my ready-made crust a bit. I think this helps the crust not get too soggy when it is loaded down.)
In a saucepan over medium heat combine whipping cream, butter and Parmesan cheese.
Cook over medium-low heat until smooth, about 4 minutes). Remove from heat and pour into a bowl. (Sauce will thicken upon standing.)
Add butter and mushrooms to saute pan. Over med-high heat, saute mushrooms for 2 to 3 minutes. Add in garlic and saute another 3 minutes. Add diced chicken to pan, stirring around so the chicken absorbs all the leftover butter and garlic and is heated through.
Spread alfredo sauce over pizza crust. Top with about 1/4 of the mozzarella. Top the sauce and cheese with the mushroom/chicken mixture and then add spinach.
Drizzle a bit more of the alfredo over everything, then add the rest of the shredded mozzarella
Cook pizza for 10 to 15 minutes or until the cheese and crust begins to turn golden brown. (But not burnt!)