How to Make It
Slice scallions, separating white and green parts. Stir together cabbage, sliced white scallion, flour, ginger, eggs, and 1 tablespoon tamari in a large bowl until well combined.
Heat oil in a large nonstick skillet over medium. Add cabbage mixture; press to flatten and cover bottom of pan. Cover and cook until bottom is golden, about 8 minutes. Carefully flip pancake; cook, uncovered, until bottom is golden, about 5 minutes. Transfer to a serving platter.
Mix mayonnaise, sriracha, and 2 teaspoons water in a small bowl. Stir together ketchup, Worcestershire, and remaining 1 tablespoon tamari in a separate small bowl. Drizzle sauces over pancake and sprinkle with sliced green scallion.