The now tri-annual and award-winning promotion features participating restaurants serving a three-course dinner prix fixe for $29.95 all night, every night (except Saturday when the menu may only be offered until 7 p.m.)   Restaurants will each serve a unique $29.95 prix fixe menu with a minimum choice of three appetizers, three entrées and three desserts. See the full participant list here.   Serving both participants and consumers, Long Island Restaurant Week provides much of the island’s population with the opportunity to save money while dining and sample restaurants they might not try otherwise. For restaurateurs, this event delivers a surge in business, a return on investment and community goodwill with the chance to win over new and returning patrons with a positive dining experience.