Enjoying a large dinner can help eliminate late-night snacking, along with eating a high-fiber diet throughout the day and refraining from filling waterbeds with mashed potatoes. Hit the sack with a full belly with today's Groupon: for $20, you get $40 worth of upscale American diner fare for dinner at Dish Restaurant in La Canada. Dish's chef, Alfred Salvatierra, revamps standard American diner fare by injecting their dinner menu with upscale, regionally sourced ingredients. Starters such as the fried calamari with spicy chipotle mayo ($7.95) anticipate hearty entrees, such as the applewood-smoked bacon cheeseburger ($12.95), whose patties are formed with a half-pound of hormone-free, fresh-ground Nebraska Black Angus beef atop a brioche bun from Wheatland Bakery in Sun Valley. The farmer's market chopped-veggie salad ($9.95) and the wild-mushroom pasta ($10.95) please plant-eaters, and a slow-roasted pork sandwich ($11.95) is slathered in succulent barbecue sauce instead of tar-the more traditional sandwich topping. A cozy, welcoming atmosphere prevails throughout Dish Restaurant, with warm, weathered floors spanning the dining room, rustic antique furniture flanking the entryway, and a painting of a luscious watermelon inviting guests to be seated. Though today's Groupon is valid for dinner only, Dish's breakfast draws droves of a.m. diners with its made-from-scratch pastries and fresh-squeezed juices, and a lunch menu marks days' midpoints with inventive updates of edible Americana, such as an American flag woven into the crust of an apple pie, sprinkled with pieces of the Constitution.