Put the julienned 1 carrot in a bowl and massage in the ¼ teaspoon salt with your hands. Let this sit while you prepare the other ingredients.
1 carrot, ¼ teaspoon salt
Bring a large pot of water to a boil and add the 4 whole spinach, root-end first. Press the spinach down into the pot and wait for the water to return to a boil. Drain the spinach and wash with cold water until completely chilled. Line the spinach up by the roots, and then squeeze as much water out of the spinach as you can using your hands. Trim and discard the roots from the spinach and set the spinach aside.
4 whole spinach
For the tuna, drain the excess liquid from the 200 grams canned tuna in a wire strainer and then add the tuna to a bowl along with the 1 ½ tablespoons gochujang. Stir to combine evenly and then set aside.
200 grams canned tuna, 1 ½ tablespoons gochujang
For the egg, whisk together the 3 large eggs, 1 teaspoon evaporated cane sugar and ⅛ teaspoon salt until the mixture is uniform and there are no clumps of white or yolk remaining. Heat a small (8-inch) non-stick frying pan over medium heat until hot and then add a the ½ teaspoon vegetable oil and spread around with a paper towel, removing any excess oil.
3 large eggs, 1 teaspoon evaporated cane sugar, ⅛ teaspoon salt, ½ teaspoon vegetable oil
Turn down the heat to low and add just enough egg mixture to coat the bottom of the pan after swirling. When the egg starts to set on top (but still a little tacky on top), use a spatula to roll the egg towards the other end of the pan. The egg should not be browned on the bottom. If it is, your heat is up too high.
Pour some more egg into the pan, swirl to coat evenly and then roll the omelette back towards the front of the pan. Repeat until you've used up all the egg. Set the egg aside and allow it to cool before slicing into 6 sticks.
To finish the carrot, massage them to force out more water. Put the marinated carrots in your hand and squeeze as much water out of them as you can. Then toss with 1 teaspoon toasted sesame oil and ½ teaspoon toasted sesame seeds.
1 teaspoon toasted sesame oil, ½ teaspoon toasted sesame seeds
To assemble the rolls, prepare a bowl of water to to dip you fingers in. Place one of thef 4 sheets gim (rough surface up) on a bamboo mat and then brush with about a quarter of the 3 tablespoons toasted sesame oil.
4 sheets gim, 3 tablespoons toasted sesame oil
Wet your fingers to keep the rice from sticking to them, and then spread one quarter of the 4 cups cooked short-grain rice evenly on top of the gim from edge to edge on the sides, all the way to the bottom edge, and 90% to the top edge. Putting down a thin layer of rice and then using a pressing motion with the tips of your fingers works best.
4 cups cooked short-grain rice
Add the 8 leaves kkaennip, 90 grams Danmuji, and the spinach and carrot, and then roll with the sushi mat, being careful not to roll the mat into the gimbap towards the end.
8 leaves kkaennip, 90 grams Danmuji
Set aside with the cut seam facing down and repeat until you run out of ingredients. This should make about 6 rolls. Slice your gimbap into 8 slices using a very sharp knife. Since the gim and fillings are already seasoned, you don't really need any soy sauce, but you can sprinkle a little sea salt on top of the cut rolls if you like.