Halal meat, or meat slaughtered in line with Muslim tradition, is at the centre of a political controversy.
Quick - a fast-food French restaurant chain - is testing out a new niche market, withdrawing all pork products from the menu and serving only halal meat in some of its branches.
Experts say that with more than 5 million French Muslims who are potential customers, Quick is targeting a booming market: the $7.5bn halal business.
But the mayor of Roubaix, a French town near the northern city of Lille, has launched a law suit against the food chain, arguing that it constituted "discrimination" against non-Muslims.
And Marine Le Pen, the vice-president of the far-right National Front party, has warned of "Islamisation".
Al Jazeera's Estelle Youssouffa reports from Paris.
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