In a large saucepan, heat sesame oil over medium-high heat until shimmering. Add garlic, ginger, and white parts of the scallions. Sauté for 1-2 mins or until fragrant.
Lower the heat to medium. Add miso paste, nut butter, and chili paste. Stir until combined.
Slowly add vegetable broth, Coconutmilk and soy sauce; stir until well combined.
Bring broth mixture to a boil and add vegetables; reduce heat and simmer until vegetables are tender.
Add noodles and remove pot from heat. Let soup sit until noodles are tender (about 5 minutes). Garnish with chili oil, sesame seeds and scallions.