Microwave potatoes in bag for 6-7 min; let cool 1-2 min, season with 1 tbsp oil, salt/pep + half the seasoning blend; divide to plates

Meanwhile, heat 1 tsp oil in skillet over med-high; pat both steaks dry, season with salt/pep + sear undisturbed 2-3 min; flip + cook 2-3 min for med-rare (for more well done add 1-2 min per side); rest steaks 5 min + reserve juices in skillet

Wipe mushrooms clean + thinly slice; heat 2 tsp oil in same skillet over high, add mushrooms + cook undisturbed 3 min; sauté 3-4 min til browned

Add 2 tbsp water + bring to a boil, scraping brown bits; cook 2 min + salt/pep; serve steak topped with mushroom sauce