Prepare the ingredients: Peel the radish, garlic, and ginger. Julienne the radish into two-inch lengths, and finely mince the garlic and ginger.
Season the radish: In a mixing bowl, add white radish, garlic, ginger, gochugaru, fish sauce, rice vinegar, salt, sugar, sesame seed oil, and black sesame seeds.
Toss to mix: Use your gloved hand or a spoon to mix the musaengchae until the red colour is uniform. Garnish with extra sesame seeds.