When deprived of flavorful sustenance, the mouth will often retaliate by shouting your bank-account number at sporting events or turning every sentence into a high-pitched jingle. Tame an unruly tongue with today’s Groupon: for $10, you get $20 worth of traditional Thai fare at Thai Peacock Restaurant.

For 13 years the popular Thai Peacock Restaurant has offered up a roster of traditional Thai menu items, concocting spicy and mild delicacies out of fresh, exotic, and locally grown ingredients. House specialties include Golden Noodle—stir-fried egg noodles with broccoli, carrot, cabbage, bean sprouts, and signature sauce ($10)—and Choo-Chee, a curry-sauced fish filet with lemon leaves ($13) often mispronounced by children doing their first train impression. Mango curry triggers sweet taste receptors with fresh mango, bell peppers, and green peas sautéed in a red-curry sauce ($9–$13.50), and Thai Peacock Restaurant's signature curry dish ($9–$13.50) enthralls the palate with a rich sauce so secret that the ingredients don't get to see each other until after they've been eaten.