Theo Peck knows his way around a matzo ball—the Food Experiments cook-off king and Blue Hill at Stone Barns alum is also the great-grandson of Jacob Harmatz, founder of Delancey Street kosher dairy Ratner’s (which shuttered in 2004 after 99 years in business). Peck resurrects the family business with this 850-square-foot Clinton Hill takeout shop and deli, celebrating Ashkenazi-style dishes (borscht, kasha varnishkes) from Ratner’s menu, but also veering out of its kosher confines with pork sausage and pâtés. Jewish stalwarts like house-made gravlax and hamantaschen cookies share menu space with updated dishes like chicken-liver terrine, salmon rillettes and carrots in salsa verde–buttermilk dressing.