Some secrets are better left untold, such as what makes Gourmet Diner's vegetable soufflé so insanely incredible. The buttery, moist, omelet-like concoction is a side dish that accompanies some main-course selections, but it always steals the show. The starring vegetable changes regularly; the broccoli and cauliflower varieties are especially scrumptious. Don't let the chrome 1950s-style diner exterior fool you into thinking Gourmet Diner is your run-of-the-mill greasy spoon. Sure, you can enjoy mainstays such as a cheeseburger ($12.95) while perched on a pale-blue banquette, but as the name suggests, the majority of the fare is quite gourmet. There's also a significant number of French items, such as the classically prepared escargots ($6.95) and the sea bass Provençal topped with tomatoes, cilantro, garlic, and white wine ($29.95). The latter pairs perfectly with the vegetable soufflé, as does the roast duck with plum sauce ($22.95). Since 1983, this eatery has attracted folks for lunch, dinner, and weekend breakfast thanks to its friendly waitstaff, throwback ambiance, and high-caliber yet straightforward cuisine. The extensive menu makes choosing tricky, but the vegetable soufflé is a no-brainer.