In a large pot, heat the vegetable oil over medium heat
Add the minced garlic and sliced onion to the pot and cook until the onion is translucent, about 5 minutes
Add the sliced chicken breasts and cook until they are no longer pink in the middle, about 7-8 minutes
Stir in the curry powder and cook for another minute to toast the spices
Add the sliced carrots, chicken broth, and coconut milk to the pot and bring to a simmer
Let the soup simmer for 15 minutes to allow the flavors to meld together
Cook the udon noodles according to the package instructions, then drain and rinse with cold water to stop the cooking process
Divide the cooked udon noodles among 4 bowls and ladle the curry soup over the noodles
Garnish with chopped cilantro and serve hot