Boil 1 pack of udon noodles in boiling water for 3–4 minutes, then rinse in cold water or ice water.

Drain the rinsed noodles thoroughly.

Mix 1 tbsp sugar, 2 tbsp vinegar, 1 tbsp soy sauce, 1/3 tbsp anchovy sauce, 1 tbsp gochujang, 1/2 tbsp sesame oil, 1 tbsp water, and a pinch of sesame seeds to make the sauce.

Place the udon noodles in a bowl and add the sauce.

Mix the noodles and sauce thoroughly.

Top with thinly sliced onion, perilla leaves, and other vegetables like lettuce or cucumber. Add a boiled or grilled egg and sprinkle sesame seeds.