1-First Step: Prep the beef and build the broth Start by soaking the 150 grams of beef brisket in water for 10 minutes to draw out blood, then drain it well. This small step helps the broth stay cleaner and less cloudy. In a medium pot, add 4 cups of water, the brisket, 20 grams of peeled onion, 5 grams of the white part of green onion, and 10 whole black peppercorns. Bring the pot to a boil over high heat. As soon as foam or scum rises to the top, skim it off with a spoon. This keeps the broth smoother in flavor and appearance. Once it comes to a boil, lower the heat to medium-low and simmer for about 1 hour, or until the brisket is tender enough to slice easily.

2-Second Step: Cool and slice the beef After the brisket is cooked, strain the broth and let it cool for about 30 minutes. Remove the brisket and let it cool until it is comfortable to handle. Trim away any fat, then slice the beef thinly against the grain. Thin slices work best because they stay tender and lay nicely on top of the noodles. While the beef cools, you can prep the toppings. Slice the Korean or nashi pear, cut the pickled radish or dongchimi radish into thin pieces, and julienne the cucumber. Halve the hard boiled egg and set everything aside in the fridge if you have room. Cold toppings help keep the whole bowl extra refreshing.

3-Third Step: Build the chilled broth Now mix the strained beef broth with 2 cups of dongchimi brine in a bowl. Add 2 tablespoons white vinegar or apple cider vinegar, 1 tablespoon pear juice, 1.5 tablespoons fine sugar, 0.5 teaspoon fine sea salt, and 0.25 teaspoon mustard powder. Stir well and taste. You may want a little more vinegar or sugar depending on how strong your dongchimi brine is. Cover the bowl and place it in the freezer for 3 to 4 hours, or overnight if that works better for your schedule. The broth should get very cold and slightly slushy at the edges. If it freezes more than you want, just let it sit at room temperature or in the refrigerator until it is icy but pourable. If needed, shave off a few ice flakes before serving for the right texture.

4-Fourth Step: Cook and rinse the noodles Cook the 200 grams of dried naengmyeon according to the package directions until they are chewy and bouncy. These noodles cook fast, so keep an eye on them. Once they are done, drain them right away and rinse under cold running water several times. This step removes starch and helps the noodles stay springy instead of gummy. If you want them even colder, chill them with ice cubes during the final rinse. Drain thoroughly so the broth does not get watered down. Then divide the noodles into serving bowls. Chilled stainless steel bowls are a nice touch if you have them, especially for a classic restaurant-style feel.

5-Final Step: Assemble and serve Pour the chilled broth over the noodles. Arrange the sliced beef, pickled radish, cucumber, pear, and halved boiled egg on top. Sprinkle with toasted sesame seeds for a little nuttiness and visual appeal. Serve right away while everything is cold and crisp. If you like a sharper flavor, add mustard paste and a splash of white vinegar or apple cider vinegar at the table. Some people love a more tangy bowl, while others prefer the broth as it is. Either way, Korean Naengmyeon Cold Noodle Soup is at its best the moment it is served.