I feel like upon clicking “add to cart,” a pop up with special instructions (per items) which will add a string to the item (in wpPizza) or ingredients (in the addon) would be hugely beneficial. Individual shop owners could use this to allow customers to input a name denoting who each sandwich is for, or to allow customer to add custom instructions such as the following layout:
-WP_Pizza Item: Steak (includes choice of 1 side)
-Ingredients (actually used for choice of sides): mashed potatoes, baked potato, side salad, fries
Custom Instruction input field:
(Well Done; For Olly; Italian Dressing; No Bacon on Potato)

Email Detail:
( Chipotle )1x Burrito [$ 7.31] $ 7.31
1x Black Beans, 1x Cheese, 1x Fajita Vegetables, 1x Lettuce, 1x Medium Green Chili Salsa, 1x Sour Cream, 1x Steak
((Well Done; For Olly; No Rice))

( Chipotle )1x Burrito Bowl [$ 7.31] $ 7.31
1x Cheese, 1x Fajita Vegetables, 1x Medium Corn Salsa, 1x Sour Cream, 1x Steak, 1x White Rice
((For Ryan))

( Chipotle )1x Crispy Tacos [$ 7.31] $ 7.31
1x Cheese, 1x Fajita Vegetables, 1x Lettuce, 1x Medium Corn Salsa, 1x Pinto Beans, 1x Sour Cream, 1x Steak, 1x White Rice

( Chipotle )2x Izze [$ 2.75] $ 5.50
1x Blackberry