Functioanliity to edit the ingredients as per the choice of a customer

I am learning mendix by creating food order app. Here I need a functionality to add or remove certain optional ingredients of a food item as per the choices of a customer. For example there are 3 types of breads, oregano, Italian and plain so customer want to select organo bread, same way for sauces and other stuff. I need that functionality but I am not getting it how shall I start. Can anyone please help me. A simple solution will also work. Not making it for complex app, just for learning. I have attached ss of my domain model and page.   Domain model:   Food Item list page where customer adds the food item into its shopping cart:        
0 answers