Half and Half pies are definitely tricky, and a real pain to set up in the back-end, but thankfully you only have to put the time into it once! So for someone who wants a Half & Half specialty like you mentioned above, we charge it 'by half' (making choosing each half mandatory). So the 1st Half would cost $12.50 ($25/2), and the 2nd Half would cost $11 ($22/2). Then they are allowed to add additional toppings (for a small fee) on top of each of those specialty sides.
Check out our "Build Your Own 1/2 & 1/2" section here: https://www.toasttab.com/bossladypizza
It's a lot because our menu is giant, but at least once a customer creates their perfect pie, ToastOO makes it easy for them to 're-order' the same thing, so they don't have to re-build their preferences every time they order.
The other alternative for Menu set-up is Menu Modifier Pricing, but last I checked this menu set-up type is not compatible with 3rd party integrations, so that's why we don't use it.
