What alternatives are there to tomato based pizza sauces? I know someone that can't eat citrus foods or foods with high acidity so when it comes to pizza this means having it with no tomato based sauces. So far this means having ranch or an Alfredo-type sauce, or worse yet no sauce! Aside from these can anyone suggest any other alternatives we can try?
Suggestions I have would be a basil pesto sauce, bbq, or a sweet chili sauce.  I have not tried this, but rather than ranch, I wonder if you could do something with caesar?