Each course is a minipuzzle indicating a single letter:
These are all seas, indicating the letter C.
Every other soup < a good pork chop soup, fresh from the pen
This clues the pigpen cipher, where "<" represents the letter U.
These are all kinds of tea, indicating the letter T.
A salad is only as good as the sum of its parts.
As suggested, sum up its parts, yielding 12, corresponding to the letter L.
Must cook smth dairy-fr. for Narmada. Idk why sh'won't chow down on animal products. Maybs a chick'n sandwich? Pity I can't avail my stomach of any actual birds for this lunchon.
The strange style and interesting spelling is to avoid using the letter E
Some ideas:
Each of these "desserts" is missing the letter R (Rice pudding, Rumcake, maRshmallow).
Waffle House is a questionable choice:
Reading capital letters gives WH O, WH AT, WH EN, and WH ERE, leaving WH Y as the missing entry.
Putting the letters from the minipuzzles together yields the answer CUTLERY.