if this is all you need, then OK,
but everything should be a list. The list is filled from tables:
tINGREDIENTS
sausage
pepperoni
mushrooms
tSIZE
12"
18"
then you can add on items simply by adding the table and they then show in the listbox.
you would dbl-click the item to Add To Cart.
using check boxes requires programming everytime you add or delete an item.