In a small bowl, combine the cornstarch, broth, lemon juice and soy sauce until smooth; set aside. In a large skillet or wok, stir-fry turkey and garlic in 1 tablespoon oil until meat is no longer pink; remove and keep warm., Stir-fry asparagus in remaining oil until crisp-tender. Add pimientos. Stir broth mixture and add to the pan; cook and stir for 1 minute or until thickened. Return turkey to the pan; heat through.