In a large pot, add a bit of oil to the pan. Over medium heat, cook the onions, stirring, until brown and slightly caramelized. Add the carrots and potatoes and cook slightly until a light crust forms. (this helps them stay together instead of disintegrating into the curry). Add the turkey as well as the appropriate amount of stock, usually 2.5 cups, but double check on your curry package. Bring to a simmer over medium heat and cook for 20 minutes or until the potatoes and carrots are tender.
Stir in the curry roux cubes until completely incorporated. Let simmer on low heat while you cook the udon according to the package. Drain the udon well and serve the curry over the udon noodles and enjoy!
