Approach the larb ($9.95) with caution. The verdant, chilled ground-beef salad is everyday fare in parts of Southeast Asia such as Thailand and Laos, and it's Panya Thai's specialty alongside the yellow curry noodle soup called khao soi ($10.95) and the cinnamony pork-intestine-and-tofu stew called guay jab ($10.95). The larb, which bellows the aroma of cumin, star anise, and cloves, pulls no punches in the heat department. As soon as the stuff passes your lips, your whole mouth goes aflame with the heat of Thai bird chilies. Your nose might run. Your eyes might water. Little beads of sweat might gather on your forehead. Despite your screaming nervous system, you can't help but plunge your chopsticks back into the mound for another go.