There's something surreally Depression Era about finding anything on a menu that costs one buck, or even two bucks seventy-five. At Heart Rock, rock-bottom prices are the norm, not the exception. Skewers of zucchini, chicken, chicken liver, shrimp, or scallops cost less than $5 each; soups like crab-spinach, mussel-miso, or mixed vegetable come in under $3. The super-spicy yukhe, minced raw beef in kimchee sauce served with a raw quail egg on top, is the Japanese version of steak tartar at about one-third the price. For a splurge, try the grilled yellowtail jaw, at just over $10: the meat inside that massive collar is exceedingly buttery and moist, flavored with smoke and dark lashings of sesame oil.