Ever since its inception in 1897, the eatery's prized and well-guarded Kabab recipe, that is said to require around 150 spices to prepare, used buffalo meat as its base.
But the ban on illegal slaughterhouses by the new BJP government in Uttar Pradesh has left the owners with no choice but to make a drastic change in their signature dish for the first time in 120 years -- replacing buffalo meat with the costlier chicken and mutton.
The result? A nearly 80 per cent drop in footfall.
Slaughterhouses allegedly running illegally have been closed down across the state, drying up the flow of buffalo meat required by the likes of the Tunday Kababis and Rahims.
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The move has affected the business of these outlets by around 80 to 90 per cent, the owners say.
"It is all quiet here, the occupancy of the outlet has been reduced to only 10 per cent now...Not all can afford the cost of the mutton and chicken kebabs," says Abu Bakar of Tunday Kababi.
The cost of raw mutton and chicken in the markets has also gone up after the closure of slaughterhouses.
Haji Bilal Ahmed of Rahim's says dishes like Pasanda and Nihari were a big draw among the poorer sections due to the lower price of the base ingredient, buffalo meat.
"This was the cheapest food for the locals. Who will eat costly items made of chicken and mutton? This has affected 80 per cent of the sale," he says.
Both Bakar and Ahmed said the government should take steps to adress the problem and find a way out.