Turkey Piccata with Tarragon Cream

Name: Turkey Piccata with Tarragon Cream
Yield: 4 main-course
Ingredients: 1 1/2 ounces pancetta or bacon, cut into 1/3-inch-wide strips; 1 cup whipping cream; 1/3 cup chopped onion; 4 large sprigs fresh tarragon plus 4 teaspoons chopped fresh tarragon; 2 teaspoons Dijon mustard; 2 12-ounce skinless boneless turkey breast tenderloins; 1 tablespoon vegetable oil