In a large saucepan, combine the vegetables, broth, soy sauce, ginger, sugar, garlic powder and pepper flakes. Bring to a boil. Add pasta. Reduce heat; cover and simmer for 8-10 minutes or until pasta is tender.
Combine cornstarch and water until smooth. Stir into pasta mixture; add turkey. Bring to a boil; cook and stir 3 minutes, until thickened.