While the chicken cooks, place the broth on the stove (separately).
Add your curry to it and bring the broth to a boil, then add your sour cream.
While you wait for your sauce to start bubbling again, mix 1 tablespoon of white flour with 2 tablespoons of olive oil.
Add the mixture to the broth, let it boil for 1 more minute or so, salt and pepper to taste then set your curry sauce aside.