Accelerator & growth investment firms Ghost Kitchens led by Karan Tanna bought controlling stake in cloud kitchen companies QSR Brands India and Eathos Group, for an undisclosed sum. QSR is valued at $5.5 million, while Eathos Group is valued at $2.2 million. QSR Brands India Pvt Ltd. led by Manoj Kudtarkar has popular brands like…