Taco meat or chicken, or leftover chili +Cheddar+ lettuce+tomato+salsa= Mexican Pizza
Leftover pot roast or roast beef+ gravy + provolone+ peppers =french dip pizza
Sliced ham+ apples+ blue cheese, or Gruyere= something fancy, I don't know, but it's yummy.
Leftover cooked chicken+wings sauce or bbq+ jack (or pepper jack)= BBQ chicken pizza
Meatballs or sausage and Mozzarella
Leftover veggies and feta, or whatever floats your boat.
I love using Broa dough for this, but wegmans has LOVELY pizza dough if you haven't planned in advance.
I bake mine at 500 on a pizza stone- and dough is cooked at 200 degrees. So I use my probe thermometer.
Now, pat yourself on the back for saving 25 bucks on fancy pizza.