In a large skillet, heat the olive oil over medium high heat. Season the chicken with salt and pepper. Add the chicken to the skillet and cook for about 10 minutes, turning every few minutes to brown on all sides. Add the onion and cook, stirring occasionally, for 3 minutes. Add the garlic and cook for 1 minute.
chicken broth and coriander and bring to a boil. Reduce heat to low,
cover and simmer for 15 minutes, until the chicken is cooked through.
Transfer the chicken to a plate and cover with foil to keep warm.
In a small bowl, whisk together the mustard, sour cream and tarragon. Stir the mixture into the skillet and simmer the sauce over medium heat until thickened, about 5 minutes. Place the chicken in serving bowls and pour the sauce over the chicken. Serve with crusty bread and herbed potatoes.
Yields 4 servings.
Adapted from Food and Wine