Preheat oven to 425° + lightly oil small baking dish; boil pot of salted water, add ½ the box of pasta + cook 10-12 min or until al dente, then drain + return to pot

Meanwhile, wipe mushrooms clean + thinly slice; heat 1 tbsp oil in skillet over high, add mushrooms + cook undisturbed 3 min; sauté 3-4 min until browned + tender, season with salt/pep + set aside

Heat lightly oiled skillet over med-high, pat chicken dry, add to pan in one layer + sear 2 min; flip + cook 2-3 min more until cooked through; season with salt/pep

Mix in chicken, mushrooms + ½ cup sauce to pasta; transfer to baking dish, sprinkle on ½ cup cheese + bake 12-15 until hot