The ADK Cafe has great food and friendly service. It's a tie with The Cottage across from the Mirror Lake Inn for the best casual food in the area.
Everything is fresh and delicious. The soups are top-notch, as are the baked goods. My cheeseburger may have been the best that I've ever had, and I eat a lot of cheeseburgers.
If the weather's nice, be sure to dine on the patio. Admire the wildflowers and try to figure out if the rushing sound you hear is a nearby stream or the sound of trees rustling in the wind or both.
I wish I were there right now.