Mince or crush garlic and lime peel. To this mixture, Add next 6 ingredients (ginger through soy sauce) to make a paste. Add this paste to the vegetable broth along with 2 cups water and bring to boil. Lower heat to simmer and whisk in coconut milk If you like a thicker broth you can add potato flour or potato flakes to thicken. In another pot, bring water to boil. Add noodles and cook for 4-5 mins. Add carrots, celery and radishes and cook another 3-4 minutes. Add Zucchini noodles, cilantro and spinach during the last minute of cooking. Drain vegetables and noodles and portion into bowls. Add broth to cover. Garnish with scallions and fresh lime wedges.