glatt 
(also glatt kosher)
adjective Judaism
(Of food) completely kosher; prepared according to a strict interpretation of Jewish dietary law.And, yes, Judaism also forbids gluttony, even if the glutton is consuming nothing but 100% glatt kosher food....
- She was giving me a glowing report about a gourmet glatt Kosher Thai restaurant in Jerusalem.
- It's like a glatt vegetarian Indian restaurant, full of Jewish people who don't really like spicy food.
Origin
Yiddish, from German glatt 'smooth' + Hebrew kāšēr 'proper'.