Modarres now hosts a series of large Shabbat Salaam interfaith dinners in San Francisco, Washington, D.C., and New York City, all of which have sold out. An observant Jew oversees the kosher process, and there’s always a separate kosher kitchen. A Muslim certifier makes sure the animals have been sacrificed in a way that’s acceptable. Abe’s Meats is not a brick-and-mortar operation: It’s more about rigorous sourcing of poultry, goat, and even black-bellied ram.
https://www.specialtyfood.com/news/article/12-under-35-mohammad-modarres-founding-director-interfaith-ventures-and-founder-abes-meats/

Until recently, there was no overlap: Meats were either kosher, halal, or neither. A new brand seeks to change that. Abe’s Meats, from Interfaith Ventures, reports that it is producing “the first-ever Interfaith Meat products that are both Halal and Kosher.” Founder Mohammad Modarres says, “Brands that offer dual Kosher and Halal food products do exist. However, meat is one of the most complicated and expensive products to produce as ‘Interfaith’ because of the production process, cost, and need to collaborate.
https://www.restaurantbusinessonline.com/advice-guy/can-meat-be-both-kosher-halal?utm_source=Marketing%20Cloud&utm_medium=email&utm_campaign=RB-Daily_07-19-18&sfmc_s=1591418