This looks good – we would try it with the yogurt and without the cilantro, as my husband David can't have the sour cream and doesn't like the taste of cilantro. 

Simply Recipes: Chicken Curry in a Hurry Recipe

If you want to use yogurt instead of sour cream, just make sure that the yogurt sauce never simmers. If it does, it will curdle.

1 Tbsp corn, grapeseed, or olive oil
1 medium onion, sliced
1/3 cup golden raisins (optional)
Salt and freshly ground pepper
1 1/2 teaspoons yellow curry powder, or to taste
4 skinless, boneless, chicken breast halves (1 to 1 1/2 pounds)*
1 cup sour cream
Minced fresh cilantro or parsley for garnish