Season the chicken strips with salt, pepper, and Italian seasoning.
Heat the olive oil in a large skillet over medium-high heat. Sear the chicken 4-5 minutes per side until golden and cooked through (165°F). Remove to a plate.
In the same skillet, melt the butter over medium heat. Add the green beans and cook 5-6 minutes, stirring, until bright green and crisp-tender.
Add the garlic and stir 30 seconds until fragrant — not brown.
Return the chicken to the skillet. Squeeze the lemon juice over everything, toss to coat, and sprinkle with parsley.