Yosemite National Park has a couple of moderately priced restaurants in lovely (which almost goes without saying) settings: the Mountain Room at Yosemite Lodge and Wawona Hotel's dining room. The Ahwahnee hotel provides one of the finest dining experiences in the country.
Otherwise, food service is geared toward satisfying the masses as efficiently as possible. Yosemite Lodge's food court is the valley's best lower-cost, hot-food option; Curry Village Pavilion's offerings are overpriced and usually fairly bland, but you can get decent pizzas on the adjacent outdoor deck. In Valley Village, the Village Grill whips up burgers and fries, Degnan's Deli has made-to-order sandwiches, and Loft Pizzeria has a chaletlike open dining area in which you can enjoy pizza, salads, and desserts.
The White Wolf Lodge and Tuolumne Meadows Lodge—both off Tioga Road and therefore guaranteed open only from early June through September—have small restaurants where meals are competently prepared. Tuolumne Meadows also has a grill, and the gift shop at Glacier Point sells premade sandwiches, snacks, and hot dogs. During the ski season you’ll also find one at Badger Pass, off Glacier Point Road.
Delaware North Yosemite has been the official park concessioner for the last 15 years, operating nearly all restaurants, lodgings, activities, and services throughout the park. As of March 2016, Aramark will take over as official park concessioner, and changes in services may occur.