Peel and mince ginger. Trim and thinly slice scallions, separating whites from the greens. Mince the whites.
In a large bowl, add the ground beef, scallion whites, ¼ cup panko, minced ginger, ¾ tsp salt, and ½ tsp pepper. Gently mix to combine.
Form 3-4 1" tall loaves and place on a parchment paper-lined baking sheet.
Roast at 425° for 15-18 minutes or until cooked through.