What is Gaat (Mustard Greens) ?
Gat, or brown mustard greens are used as a herb in winter kimchi or as an ingredient for gat kimchi. Gat is a vegetable with a strong aroma that makes it closer to an herb.
Not To Be Confused With
Yeolmu (radish greens) - the tops of young radishes
Where and What To Buy
Mustard greens or Brown Mustard can be bought from the Korean grocery store
How to Use/Cook
Gaat or Brown Mustard Greens are mostly used in making Kimchi. It's either an added ingredient like green onions or you can make Gaat Kimchi 갓김치 using Gaat as the main kimchi ingredient.
Nutrition/Health Info
Brown mustard helps improve pneumonia, rheumatoid arthritis, and neuralgia. It also contains many antioxidants which can protect your skin barrier, and prevent diabetes risk factors.
References:
https://www.webmd.com/diet/health-benefits-mustard-greens#:~:text=Mustard%20greens%20contain%20many%20health,Vitamin%20K