I freeze pizzas all the time for friends (they like it THAT much). I press out my dough and grate some fresh parm onto the dough. I then par bake the dough at 550. Let the dough cool. I then add sauce and cheese. Wrap VERY well with plastic wrap and put in frezer. When it is needed, just take it out of the freezer when you turn the oven on and top with favorite toppings. It tastes almost as good as fresh pizza. Pepperoni and any precooked meat freezes well also.
It's never going to taste like fresh, but I have great success by baking it as usual, letting it cool completely, then cutting into pieces. Reheat them over medium heat in a covered nonstick or cast-iron skillet. The bottom crust actually improves on most pizzas vs. when they were fresh.
The biggest issue with it is the veggies getting icey, and all that thawing first in the oven creating a puddle. Best to put those on after. Honestly sometimes the veggies freeze badly and sometimes they don't. I find it better to leave it unwrapped in the freezer until it freezes them wrap it up in a bag. It just pulls a bit of the moisture out.
Of course you can.
Just a word of caution. If you freeze with the pizza crust rolled out and the toppings already assembled just make sure to wrap it well -- e.g. on a cookie sheet with a tight saran wrap cover -- otherwise you'll end up with freezer burn as an additional ingredient.
Patrick, I do it all the time. I roll out the pizza dough and cook it on the grill set for medium
heat for two minutes on the first side and one minute on the second. Only cooked enough
so it holds together. Then put on the cheese and toppings but not any veggies. One of
the biggies is chicken. When you pull it out of the oven put on a handfull of pico de gallo
and dollops of Guacamole.
Add any veggies just before you put the pizza in the oven.
I put them in the oven frozen solid and have not had problems with them being watery,
I suspect that you might have some problems if you thawed them out before you put
them the oven.
I quick freeze them on a cookie sheet and then store them in three plastic bags one
inside the other.
As to the taste, I can't tell the difference using grated Mozzarella but fresh Mozzarella
Pablito el gordito.