I love having Breakfast at Le Coucou - you'll find me here several times a week. Le Californien, OJ and Expresso! Dinner is very formal - but amazing if you dig the French high-end, but Pro tip: They have amazing drinks, so drop by and hang in the bar for a few drinks!
My second-favorite outdoor-place in Manhattan. The abandoned 1.6 km rail tracks running above Chelsea down to the Meatpacking district were turned into an above-ground park. Perfectly nice place for sitting in the sun, reading, relaxing, having lunch in some green spot in the city. Nice views at the Hudson River, New Jersey, the Statue of Liberty (little small from there but still visible) and the architecture around Chelsea.
Seasonal salads, sweet and savory treats, and great coffee. It's probably my most common lunch spot when I work from home and they also offer catering if I'm too nervous to cook but want it to feel homemade.