1 teaspoons sesame seeds (½ teaspoon black and ½ teaspoon white sesame seeds)
Directions
Place the soy sauce, brown sugar, vinegar, gochujang, mirin, garlic, ginger, and sesame oil in a small saucepan.
Whisk to combine and bring to a low simmer over medium-low heat, whisking frequently.
Cook the glaze for 10 minutes, remove from the heat, and set aside. (You can also transfer the glaze to a bowl for easier brushing.)
Meanwhile, brush the burger buns with softened butter.
Toast the buns (either in the oven, stove-top, or toaster oven) until lightly golden. Set aside.
Heat the oil in a large skillet over medium-high heat.
Once hot, add the portioned ground beef and cook for 2 minutes.
Using a spatula, firmly press the ground beef into patties, and continue to cook until thoroughly seared on the bottom, about 2 minutes more.
Flip the burgers and generously brush with the glaze. Continue cooking for 3–4 minutes, or until the other sides of the burgers are thoroughly seared. Reduce the heat if you see the glaze begin to burn.
Remove the burgers from the heat, flip again, and brush the other side with glaze. Set aside to rest for 1–2 minutes.
Brush the insides of both the top and bottom toasted burger buns with mayonnaise.
Place a burger patty on the bottom bun and (optionally) brush with additional glaze.
Top the patties with kimchi, cilantro, scallions, and crispy onions.
Add a fried egg to each burger and sprinkle with some sesame seeds.