Sprinkle the chicken tenderloins with salt. In a large skillet, heat 1 tablespoon of oil over medium-high heat and brown half of the chicken on both sides. Remove from the pan; repeat with the remaining oil and chicken.
Add onion to the same pan; cook and stir over medium heat for 2 to 3 minutes or until tender. Stir in the broth, cranberries, jam and vinegar; return to a boil. Reduce the heat and simmer, uncovered, for 2 to 3 minutes or until slightly reduced. Return the chicken to the pan; cook, uncovered for 4 to 6 minutes longer or until the chicken is no longer pink, turning the chicken halfway through.