Preheat oven to 425°; heat 1 tbsp oil in skillet over med-high; pat chicken dry, season with salt/pep + cook 4-6 min per side til fully cooked; transfer chicken to a sheet pan

Wipe mushrooms clean + thinly slice; heat 1 tbsp oil in skillet over high, add mushrooms + cook undisturbed 3 min; sauté 3-4 min til brown + tender; add salt/pep

Top chicken with ½ container sauce, mushrooms + ½ block mozzarella sliced thinly; bake 6-8 min until cheese melts

Meanwhile, boil a pot with ½ cup water + pinch of salt; add green beans, cover + steam til tender, about 3-4 min; drain, season with salt/pep + drizzle of oil

Divide chicken + beans between plates