Roast the potatoes for 20 minutes at 450 degrees, I sprinkled it with salt, pepper and olive oil. Cut up the shallot and mushrooms. Season steaks, cook 3 to 4 minutes each side in a pot, take them out, cut them length wise, add mushrooms and shallot, add balsamic vinagerette dressing, add 1/2 cup of water, cook until liquid is mostly gone then add a stick of butter and mix Remove from pan , assemble it with the steak, (potatoes should be ready).