An unfed stomach can lead to embarrassing situations, such as noisily growling in quiet libraries or phoning in unintelligible takeout orders while you nap. Keep your belly's mouth buttoned with today's Groupon: for $10, you get $20 worth of Vietnamese cuisine at Le Soleil Restaurant.

Le Soleil's sizable menu showcases a variety of authentic Vietnamese eats, ranging from the ever-popular pho to the country's lesser known edible gems. After properly stretching jaw muscles with a warm-up of fried egg rolls ($2.50), canines can sink like life rafts made of anvils into a fried catfish fillet accompanied by saucy ginger ($9.95). Patrons that sup on Saturday can treat their cochleae to live music while awaiting an entree of five-spice grilled chicken ($8.95). Small ($5.95) or large ($6.25) bowls of pho, the classic Vietnamese beef soup loaded with noodles, a choice of meat, cilantro, and jalapeños, pack enough soup-based seduction to convince diners to adopt liquid diets and replace their teeth with straws.