Preheat your oven to 375°F (190°C) and prepare a loaf pan by lining it with parchment paper or greasing it.

In a small bowl, combine the panko breadcrumbs with milk and let them soak for about 5 minutes.

In a large mixing bowl, combine the ground beef, ground pork, soaked panko mixture, eggs, finely chopped onion, minced garlic, gochujang, soy sauce, sesame oil, brown sugar, ground ginger, salt, and black pepper. Mix well.

Transfer the meat mixture into the prepared loaf pan and shape it evenly into a loaf form.

In a separate bowl, whisk together the ketchup, rice vinegar, honey, and gochujang to create the glaze.

Spread the glaze evenly over the shaped meatloaf.

Place the loaf pan in the preheated oven and bake for 50 to 55 minutes, or until the internal temperature reaches 160°F (71°C).

Once baked, remove the meatloaf from the oven and let it rest for about 10 minutes. Slice and garnish with sesame seeds and sliced green onions.