To make the peanut sauce, whisk together the garlic, peanut butter, sesame oil, fish sauce, lime juice and enough water to thin it until it’s smooth. Set aside. Put a large pot of salted water to boil. Heat the vegetable oil in a skillet over medium-high heat. Add the leeks. Cook, stirring constantly, until browned and beginning to turn crispy. Add the soy sauce and sugar and stir quickly. The sugar will smoke a bit, but that’s ok. Cook for just a minute until the soy sauce is absorbed. Turn the heat off. Cook the ramen until tender, about 2-3 minutes. Toss the warm noodles with the peanut sauce. Add leeks and toss once more. Serve the ramen garnished with pickled radish and minced cilantro.