Boil a large pot of salted water, add half the box of pasta + cook 4-6 min or until al dente, then drain + return to pot; toss butter into pasta to melt + coat

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

Wash + dry parsley; remove stems + roughly chop

Toss pasta with mushrooms + parsley; divide to plates + dollop 2-3 tbsp ricotta onto each