Unless they are sliced thickly and undercooked, onions are a big OH YEAH on pizza. At DiFara, they magically melt into the sauce and cheese. Just yesterday, we got the superb tomato pie at Papa's (http://mainlinepizzaquest.blogspot.com/2012/02/review-papas-tomato-pies-trenton-nj.html) in Trenton; they do the onion-thing pretty well also. The danger with any vegetable pizza topping is the introduction of moisture that can destroy the crust. But thin-sliced onions add savory and earthy flavor with little risk of ruining the pie's balance.
Unless they are sliced thickly and undercooked, onions are a big OH YEAH on pizza. At DiFara, they magically melt into the sauce and cheese. Just yesterday, we got the superb tomato pie at Papa's (http://mainlinepizzaquest.blogspot.com/2012/02/review-papas-tomato-pies-trenton-nj.html) in Trenton; they do the onion-thing pretty well also. The danger with any vegetable pizza topping is the introduction of moisture that can destroy the crust. But thin-sliced onions add savory and earthy flavor with little risk of ruining the pie's balance.