Most airline meals are either hit or miss.
On several lunch flights on UA: I had the most incredible and immense chicken salad with very fresh croutons (Which I eat like potato Crisps!) They were good.
I always try to get into business or First to get a decent meal... and those great cheesecakes, cookies and Ben & Jerry Ice Cream Sundaes (Sorry it's not Blue Bell!)
Some of the coach meals are frightening. Occassionally they'll have something edible (like the beef burrito on CO for lunch.)
The best snack food: Pepperidge Farm Goldfishes which can replace peanuts anyday for me!