Ingredients: For the Filling: 1 lb boneless, skinless chicken thighs 1 tablespoon olive oil 2-3 rosemary sprigs, chopped Salt and pepper to taste 3 leeks, sliced 3 cloves garlic, minced 3 tablespoons flour 1/3 cup white wine 2 cups chicken stock 1/2 cup crème fraîche or sour cream For the…