Korean Street Toast (Gilgeori-toast 길거리토스트). It’s basically a Korean breakfast sandwich. There’s no one way to make it but it’s usually egg mixed with various veggies that is fried into a patty and put on buttered toast (think made like a grilled cheese). It’s gotten super popular in Korea as a quick street food breakfast and there’s Korean Toast shops popping up all around the world now. Here’s a recipe from Maangchi, but you can put basically anything you want on it. This one had ham, cheese, and a sweet gochujang sauce on it. Got it from a vendor in a local Korean themed food hall.
Look up food wishes korean street toast on youtube for a great tutorial.