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

Meanwhile, heat 1 tbsp oil in skillet over med-high; add half of broccoli, salt/pep + sauté 4-5 min til lightly browned; add 2 tbsp water, reduce heat, cover + steam 3-5 min more til tender

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

Toss pasta with broccoli, mushrooms + ½ cup pesto; add to baking dish, top with ½ cup cheese + bake 10-15 min til cheese it melted