Preheat oven to 400; boil a large pot of salted water, add half 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 a skillet over high, add mushrooms + cook undisturbed 3 min; sauté 3-4 min until browned + tender, season with salt/pep + add to pasta

Pat chicken dry, then slice into ½-inch pieces + add to pasta with 1 cup sauce; mix to combine

Lightly oil a baking dish + add pasta mixture; sprinkle pasta with ¼-½ cup cheese + cover with foil; bake 10-15 min until bubbling; remove foil + bake 10 min more until cheese is melted