Whisk together chicken broth, balsamic vinegar, garlic, and Italian seasoning.
Place chicken tenders in a resealable plastic bag with the marinade. Massage and shake to coat. Let sit on the counter for no more than 30 minutes or marinate in the fridge for an hour or up to 12 hours.
Heat olive oil in a large, heavy bottomed skillet.
Season chicken with salt and place in the skillet with space between each piece. Work in batches if you have to. Cook the chicken over medium high heat until browned on both sides; about 3-5 minutes per side.
Transfer cooked chicken to a plate and cover with foil. Rest 5 minutes before serving.
Notes
The longer you can marinate, the better this chicken will be. Instead of stove top cooking, you can bake at 400 degrees for about 15 minutes.