Bar Brace

They are all the same in Delta terminals C and D. They really don't vary that much in the food they sell, and they all sell it at ridiculously exorbitant prices. Tip: bring your own meals and snacks at airports, especially LGA's Delta terminals.

Wow LGA terminal D is sweet! iPads galore!! Bar brace great euro breakfast cafe spot.

Espressos and artisanal sandwiches

Ok, I've eaten here twice in the past six months and both times were good.  First of all, I have to say this is the coolest airport terminal I've seen!  iPads everywhere that let you relax and order food and drink from among a few nearby eateries, and also play games or read the NY Times.
My first visit, I saw cacio e pepe (pasta with cheese and pepper- mmmm good!) on the overhead menu, which has become one of my favorite dishes. I ordered it but was then told it's no longer available but the menu hadn't been updated yet. But then, she asked the chef if he had everything to make it for me anyway and he said YES!  I ordered it with a nice Chablis. It wasn't the best cacio e pepe I've had, but they got points for going off-menu in an airport eatery.
My second visit, I decided to try one of the many paninis they sell.  I don't remember which one I got but it was quite good, especially with a glass of red.  Each visit was finished with a solid double cappuccino.
It's difficult to use Yelp for airport dining because I never know if the previous reviews are using the airport food-weighting scale or the real world scale?  Since it's not really an option to exit the airport during a flight connection, I use the airport scale. A four-star in La Guardia is not the same as a four-star in Manhattan, but for comparison, the Burger King gets two stars.  Hope that helps!