Question: Nathan Handwerker was founder of a company that specializes in what food?

Context paragraphs:
Deep Foods: Deep Foods is a food manufacturer based in Union Township, Union County, New Jersey that was founded in 1977 when Gujarati delicacies made by Mrs. Bhagwati Amin became popular among her neighborhood families and local grocers.  To meet the growing demand, in 1977, Mrs. Amin and her husband began work on what is today Deep Foods Inc. and specializes in frozen prepared Indian foods.  The company produces the Tandoor Chef line of frozen food products.  The company also produces products such as frozen vegetarian naan pizzas, which are produced entirely in India, and 14 flavors of ice cream.

Nathan Handwerker: Nathan Handwerker (June 14, 1892 – March 24, 1974) was the founder of an iconic hot dog stand that evolved into Nathan's Famous restaurants and related "Nathan's" retail product line.  An immigrant from Eastern Europe, he and his wife Ida borrowed $300 from friends to start their business on Coney Island in 1916.  As of 2016,Nathan's operates over 400 company owned and franchised restaurants in all 50 states and 17 foreign countries, and Nathan's brand products are found in some 45,000 stores across the United States.

Vital Farms: Vital Farms is an Austin, Texas based food company that specializes in pasture-raised eggs and pasture-raised butter.  Founded in 2007 by Matthew O’Hayer and his wife Catherine Stewart, the company is widely considered to be the leader in the American pasture-raised food industry.  The company has been celebrated for not only the quality of their products, but also the way in which they care for their employees and the animals that create their products.  They have also been honored for their unique approach to marketing and package design.

Leo Pearlstein: Leo Pearlstein is the founder and President of Lee & Associates, Inc., a full-service public relations and advertising firm, which he opened in 1950.  He currently runs the company with his partners, two of his sons, Howard and Frank Pearlstein.  He also founded and is Director of Western Research Kitchens, the food and beverage division of his agency He is considered a pioneer food consultant and his agency was recently named as one of the top agencies in the country that specializes in food and beverage clients

Murray Handwerker: Murray Handwerker (July 25, 1921 – May 14, 2011) was an American businessman who expanded Nathan's Famous, a fast food restaurant specializing in hot dogs, from a family-owned hot dog stand to a nationally franchised chain.  The original Nathan's Famous hot dog stand was opened in Coney Island, Brooklyn, by Handwerker's father, Nathan Handwerker, in 1916.

Sunlight Electric: Sunlight Electric is a designer and retailer of commercial photovoltaic systems. Headquartered in Sonoma, CA, Sunlight Electric is a private company that specializes in commercial solar power systems and has considerable success serving growers, producers, and distributors of food and beverage products.  Sunlight Electric's founder and CEO, Rob Erlichman, started Sunlight Electric in 2002 due to poor customer service while looking into installing solar power for his home.  He believed that in order for solar power to catch on as a mainstream technology, things would have to change.  The company creates economically motivating solar projects that typically cut customers' after-tax electricity cash flow by at least 50%.

Nathan's Famous: Nathan's Famous, Inc. is an American company that operates a chain of fast food restaurants specializing in hot dogs.

Big Daddy's Restaurants: The first Big Daddy's Restaurant opened in 1964, and was located on Coney Island Avenue in the Sheepshead Bay section of Brooklyn, NY.  It was known to be the only true competitor of Nathan's Famous Hot Dogs.  The driving force behind Big Daddy's success was the partnership of Murray L. Handwerker, the nephew of Nathan Handwerker, founder of Nathan's Famous and Robert "Big Daddy" Napp.

Central Market (Texas): Central Market is an American gourmet grocery store chain owned by H-E-B Grocery Company based in San Antonio, Texas.  It specializes in high-quality, hard-to-find gourmet foods.  Most locations also have a full-service kitchen, offer cooking and wine classes in their culinary school, and offer catering services.  The chain has nine locations, all in Texas.  Central Market was named "Outstanding Specialty Food Retailer" by "Specialty Food Magazine" and the National Association for Specialty Food Trade.

Great British Chefs: Great British Chefs is a food multimedia company that publishes recipes and other cooking-related material via its website, in a series of downloadable applications for iOS and through a range of social media.  The company is notable for working with a high standard of chefs, most of whom have been awarded a Michelin star.  The website and apps feature recipes from chefs including Marcus Wareing, Paul Heathcote, Tom Aikens, and Nathan Outlaw.  Great British Chefs has also produced a number of how to videos along with restaurant and chef profiles on its website, as well as publishing a blog featuring posts from a number of recognised UK food bloggers.

Supporting paragraphs: Nathan Handwerker Nathan's Famous
Answer: hot dogs.