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Portillo's Hot Dogs is a popular fast-casual restaurant chain that serves classic Chicago-style hot dogs, Italian beef sandwiches, and other regional favorites. Founded in 1963 by Keith Portillo and his sister Loraine, the restaurant has become a staple in the Midwest, particularly in Illinois.

The menu at Portillo's features a variety of traditional American fare with an emphasis on Midwestern cuisine. Their most famous item is undoubtedly the hot dog, served on a poppy seed bun with mustard, relish, onions, tomatoes, sport peppers, and pickle spear. The restaurant also offers other specialty hot dogs, such as the "Chili Cheese Dog" and the "Chicago-Style Hot Dog."

In addition to their hot dogs, Portillo's is known for its Italian beef sandwiches, which are slow-cooked in a savory broth and served with au jus on the side. The sandwich is typically topped with melted mozzarella cheese and served on a crusty roll.

Portillo's has gained a loyal following over the years, not only for its delicious food but also for its nostalgic atmosphere. The restaurant's decor features vintage Chicago memorabilia and photographs, creating an immersive experience for customers.

Despite being a regional chain, Portillo's has expanded to several locations throughout the Midwest, with each location serving the same classic menu items that have made it so beloved by locals. Whether you're a lifelong Chicagoan or just visiting the city, Portillo's is a must-visit destination for anyone looking to experience the authentic flavors of the Windy City.