For the dipping sauce, combine all the sauce ingredients in a small bowl and stir to combine. Set aside.
Combine the flour, cornstarch, and salt in a medium bowl. In a small bowl, lightly beat the egg, water, fish sauce/miso paste and stir the wet mixture into the dry mixture just until blended. Be careful not to over-stir.
Heat 1 tablespoon of the oil in a non-stick pan over medium-high heat and briefly sauté half of the garlic. Add half of the scallions and sauté for about 30 seconds. Arrange scallions according to desired shape. Pour 1/2 of the batter over the scallions and tilt the pan to smooth out the mixture. Fry until the pancake is golden brown and crispy on the bottom and then flip over and cook the other side until also browned. Repeat this process for the other pancake. Cut each pajeon into wedges and serve hot with the dipping sauce.Serves 2 as a main dish; serves 4 as a side dish or snack.