Hell Papa Johns is offering 45% off everything today because Kentucky won...I was tempted to grab a pizza myself today.
If you want to fulfill this need go light on the cheese, light on the sauce, thin crust, no toppings. Just put garlic powder and other non meat toppings on there and you should be fine.
Just plan cheats...stop with the impulse eating. You can also get one of those totinos party pizzas which have about 700 calories and SHOULD fulfill the needs of many.