Cooking this dish for the third time tonight—I’m hooked on that incredible sauce!

4 boneless, skinless chicken breasts
1 cup chicken broth
1 cup heavy cream
5 cloves garlic, minced
1 teaspoon dried thyme
1 teaspoon dried rosemary
1 teaspoon dried parsley
Salt and pepper to taste
2 tablespoons olive oil
2 tablespoons cornstarch
2 tablespoons water
Fresh parsley, chopped, for garnish