One of the world's largest hamburger chains may add a meatless menu for vegetarian fast food lovers.

Burger King, which introduced six vegetarian sandwiches and burgers last year it its Indian locations, including a Veggie Whopper and a vegetarian chili cheese melt, could expand its meatless options to other markets, The Business Insider reported.

"Looking at the response here, the global management is evaluating introducing some of these options going forward to other vegetarian-friendly markets like the UK," Raj Varman, chief executive officer of Burger King India told Indian news agency PTI, according to The Economic Times.

When the fast food restaurant launched in India last November, it offered menus to suit the Indian market since many of them "do not eat beef or any meat at all," Fox News reported. According to Varman, 18 Burger King locations popped up in Delhi, Mumbai, and Chandigarh. There are plans to open six new restaurants in the next two months.

Burger King isn't the only fast food chain to expand its menu. McDonalds, which also offers meatless options at its locations in India, tried to expand its vegetarian offerings to the United States "on numerous occasions without success," The Business Insider reported.

After an attempt in 2011,  where McDonald's tested a veggie burger at select locations, CEO Don Thompson reportedly told investors that they "sold just four a day," according to Bloomberg News.

White Castle is also testing out a vegetarian option, in January they started offering a 99 cent veggie slider.

"If options like a veggie burger exists, it reduces the veto vote and gives everyone in the party a chance to order what they want," Darren Tristano, executive vice president at research firm Technomic, told Businessweek.