Prison Food
Answer: THRONE
Farid Khuri-Makdisi

We begin by solving the six subpuzzles:
Appetizer:
We can recover a word with the prefix "dis" by changing one letter of each of these foods:

Food Word with "dis" prefix Changed Letter
Tarts Distorts O
Colon Discolor R
Carb Discard D
Kase Disease E
Kobe Disrobe R
In accordance with the theme, the answer is DISORDER.
Broth
We remove all the "chunks" of food: The letters of FRY, PIE, BROWNIE, BAGEL, JAM, and KIWI. We are left with a soup of letters. These can be partitioned into common soup names (MISO, GUMBO, ONION, LAKSA), which we can trace out to give us the final answer, SWAP as shown below:

Catch of the Day
Let's resolve the wall. This is an Only Connect-style wall where each group of four fishes has a connection.
Color: Gray mullet, Goldfish, Yellowtail, Salmon
Finding Nemo: Clownfish, Moorish Idol, Porcupinefish, Blue Tang
(Can be preceded by) Blue: Ridgehead, Ribbonfish, Moonfish, Lagoon triggerfish
Reptile: Snake mackerel, Lizardfish, Alligator Gar, Viperfish
The connections fit the enumerations below and give us the final answer, COUP.
Dinner
These are cryptic clues themed after food:
Fall's first turnips, radishes, Idaho potatoes (4) = T_ + R_ + I_ + P_ = TRIP (initials)
Rare pork butt in Neuilly salad (8) = _K in (NEUILLY)* = UNLIKELY (place K in an anagram of NEUILLY)
Larger scrambled egg, rib (6) = (EGGRIB)* = BIGGER (anagram EGGRIB)
Green diverse stuffed vegetable (6) = _EN DIVE_ =ENDIVE (ENDIVE is hidden in gre_EN DIVE_rse)
Reading the first letters of these words gives us the final answer, TUBE.
Edible Salad
Each "salad" clues a famous pop culture hero/character. Those are:
ANTMAN
GROOT
OPTIMUS PRIME
NARUTO
YODA
Again, reading the first letters of these words gives us the final answer, AGONY.
Frozen Dessert
This is a shimaguni/islands logic puzzle. The solution is:

If we read the letters that overlap shaded cells inside the cone, we get ANS IS EQUINE.
Metabolize
We solve the meta. Our six answers are DISORDER, SWAP, COUP, TUBE, AGONY, and EQUINE. Each one is connected to a CMU dining location: We extract from those to get the final answer, THRONE:
Subpuzzle Answer CMU Dining Location Extracted Letter
DISORDER ENTROPY+ T
SWAP THE EXCHANGE H
COUP REVOLUTION NOODLE R
TUBE THE UNDERGROUND O
AGONY AU BON PAIN N
EQUINE ZEBRA LOUNGE E


Author's Notes

It was really fun writing a puzzle with the constraint of loosely making it look like a menu.