Add Special Offers category

i want add Meal deal for example

special Deal

Any 6" large pizza,
2 pieces of chicken wings,
cheesecake OR cake
1.5L bottle of soft drink

for fix price but at the same time could modify pizza or choose between two option?i wondering if you could let me know what method i need use or send me the link for tutorial

Easiest way is just to create a product for that and appropriate order tags for modifying pizza.

V5 has better support for this since you can map Order Tags into recipes.