you can only do this sort of things (and in your specific scenario only partially – see below) with the add ingredients extension (https://www.wp-pizza.com/downloads/wppizza-add-ingredients/)

note: the add ingredients extension is primarily designed to add ingredients/toppings (or whatever you want to call it) to an existing menu item.

as i understand you , you want to add several menu items to another menu item (this in your case being the “5 course meal”).

as mentioned above, this is not the main purpose of the plugin. however, upi to an extend you could cheat somewhat by doing the following (assuming you have that plugin installed of course).

a) add a menu item called “5 course meal” as normal to your wppizza menu items

b) go to add ingredients and add all your starters, mains, side, rice and naans as new/separate ingredients (setting all prices to zero here i would have thought as your “5 course meal” price would/should not change if any of these are added

c) go to “custom groups” and set a group for each type of ingredeints – in your case you would have 5 groups (1, Starter 2, Main 3, Side 4, Rice 5, Naan) and add the relevant ingredients to these groups

so – using rice here as example – assuming you have set the following ingredients :
plain rice, egg fried rice, basmati rice (etc etc)

you create a custom group, name it “rice” , and add those three to that group (probably want to set the group type to “group must have one and only one ingredient one time…..etc”)

do the same for all others respectively

what you can NOT do is have main dishes like “tikka massala”, “tandori”, “korma” etc and then allow to select additionally whether you want “lamb” or “chicken” etc etc

HOWEVER – instead of “main” you could say “type” (here have “tikka”, “tandori” etc )
add another called meat or veg (here have “chicken”, “lamb” “vegetable” etc and let people choose that way

essentially you would have to have/enter your whole menu as ingredients too

go here https://www.wp-pizza.com/twentytwelve/our-menu/user/ and look at the breakfast example.
just imagine that the “drinks” are your “rice” and/or starters etc

>make the meal deals seem a bit more seamless.

i know, but this sort of thing is horrendously complicated if you want to make it useful for a wide range of scenarios / sites / requirements …

this will be done at some point, but there’s absolutely no ETA as to when