Heat oil in a small sauce pan at medium high heat.
Add onions and crushed red pepper.
Cook until soft, about 5 minutes, stirring frequently.
Add minced garlic and cook for one minute.
Wisk in wine, rosemary, parsley and salt.
In a separate bowl, wisk cornstarch and chicken broth.
Add mixture to sauce and stir well.
Bring to a boil and set aside.