Bring a medium pot of water to a boil and add the ramen noodles. Cook for 2-3 minutes or until al dente. Stir occasionally to help the noodles break apart. Reserving 1 cup of the cooking water, drain the ramen and set aside.
While the ramen is cooking, heat the toasted sesame oil over medium heat in a medium-sized saucepan. Add the whites of the scallions and saute for 1 minute. Add the garlic and saute for 30 seconds.
Add the soy sauce, ground ginger, chili oil, sweet chili sauce, and rice wine vinegar to the saucepan. Bring the sauce to a boil, and then turn off the heat.
Transfer the ramen to the pan with the sauce and toss to coat. Add the reserved water from the ramen, ¼ cup (60 ml) at a time as needed, to help the sauce coat the ramen.
Serve warm, garnished with the greens of the scallions.
Notes
To store: Transfer leftovers to an airtight container and refrigerate for up to 4 days. You can heat up the spicy ramen in the microwave or a skillet over medium heat, or eat the noodles cold.To freeze: Transfer spicy ramen to an airtight container or freezer bag and freeze for up to 3 months. Let it thaw in the refrigerator before reheating.