Preheat oven to 450°; mix potatoes with 1 tbsp oil, salt/pep + fave spices, then spread on a sheet pan; roast 15-18 min until tender

Meanwhile, heat 1 tbsp oil in skillet over med-high; pat chicken dry, season with salt/pep + cook 4-6 min per side until fully cooked, no pinkness remains; remove chicken from pan, reserving pan juices

Wipe mushrooms clean + thinly slice; thinly slice ½ onion; heat 2 tbsp oil in same skillet over high, cook mushrooms + onions 5-7 min until tender; add chicken + 1 cup sauce to veggies + simmer 3-5 min until hot

Divide saucy chicken + potatoes to plates—nice job chef!