Spicy Soba Noodles Recipe

Heat soy sauce in a saucepan. Add brown sugar and bring to a boil. Lower heat and stir in molasses. Simmer for 5 minutes. Transfer to a bowl then mix in sesame oil, tahini, chili oil, and vinegar. Whisk to combine. Season with salt and pepper.

Bring a large pot of salted water to a rolling boil. Add buckwheat noodles and bring to a boil. Cook, stirring occasionally, just until slightly soft, about 3 minutes. Plunge noodles in ice-cold water and drain. Place in a colander and rinse under cold running water.

Combine noodles, sauce, leeks, and carrots. Garnish with toasted sesame seeds.