Preheat the oven to 375 degrees. In a large bowl, combine the ground beef, panko breadcrumbs, eggs, half the scallions, half the ginger, 2 tablespoons soy sauce, and a pinch of salt and pepper. Mix until just combined.
Shape the mixture into a loaf and place it in a loaf pan. Bake for 45 minutes until the internal temperature reaches 160 degrees.
While the meatloaf bakes, heat the vegetable oil in a large skillet over medium heat. Add the garlic and remaining ginger and cook for 30 seconds until fragrant.
Add the bok choy to the skillet along with the remaining soy sauce. Stir-fry for 3 to 4 minutes until the bok choy is wilted but still crisp. Season with salt and pepper.
Remove the meatloaf from the oven and let it rest for 5 minutes before slicing. Serve slices with the stir-fried bok choy and cooked rice on the side. Scatter the remaining scallions over everything.