In a bowl, whisk together the flour, water, and egg whites until the batter is smooth. Stir in the clams, scallions, and salt. To a heated pan, add the oil. Scoop 2 tablespoons of the batter into the pan to form pancakes about 3-inches in diameter. Let cook for about 3 minutes per side until golden.
To make the sauce, combine all sauce ingredients. Serve the pancakes immediately with the sauce.