Prepare the Chicken: Season the chicken tenders with salt and freshly ground black pepper on both sides.
Sear the Chicken: In a large skillet, heat the olive oil over medium heat. Add the seasoned chicken tenders and cook for 3-4 minutes on each side until they are golden brown and cooked through. Once done, remove the chicken from the skillet and set aside.
Create the Glaze: In the same skillet, reduce the heat to medium-low and pour in the apple juice, honey, apple cider vinegar, Dijon mustard (if using), and ground cinnamon. Stir the mixture well to combine all the ingredients. Let it simmer gently for about 5-7 minutes, stirring occasionally, until the glaze thickens slightly and becomes syrupy.
Glaze the Chicken: Return the cooked chicken tenders to the skillet with the glaze. Toss them gently to ensure each piece is thoroughly coated with the sweet and tangy glaze. Allow them to simmer in the glaze for an additional 2-3 minutes to absorb the flavors.
Serve: Once the chicken is well-glazed and heated through, transfer the tenders to a serving platter. Drizzle any remaining glaze over the top. For an added touch, garnish with fresh thyme leaves or thin apple slices. Serve immediately alongside your choice of sides.