A popular Boston sandwich shop is planning to open in Waltham, at the former Griff Furniture location at 584 Moody St.

Mike & Patty's, which has one small location in Bay Village in Boston near the Theater District, opened in 2008, and was started by Michael Fitzhenry and Patricia Sinaiko.

The Boston location has only a small selection of chairs and is more of a take-out eatery than a sit down restaurant. The Waltham location, however, will be a much more substantial, 2,800-square-foot establishment.

The menu for the Waltham location is unknown, but the original Mike & Patty’s serves only breakfast and lunch sandwiches, and has garnered a reputation for offering one of the best breakfast sandwiches in the entire city.

The restaurant’s signature sandwich is called "The Fancy," which consists of two fried eggs, cheddar cheese, avocado and red onions on multigrain bread.

Other standouts include the "Breakfast Torta," which includes the same ingredients as the Fancy, but substitutes potatoes, black beans and salsa instead of red onions, and is served on a sesame roll. The "Breakfast Grilled Crack" comes with a fried egg, bacon, American, cheddar and gruyere cheeses on a buttered sourdough bread.

According to an email from the restaurant’s management, the eatery is hoping to open in Waltham by the end of the year.

The Boston location, located at 12 Church St., Boston, opens at 7:30 a.m. Wednesday through Sunday, and at 8 a.m. on Monday and Tuesday. The shop closes at 2 p.m. during the week, and 2:30 p.m. on Saturday and Sunday.