Preheat oven to 475°; add half the potatoes to a large pot + cover with 2 inches of water + 2 tsp salt; bring to a boil over high + cook 10-12 min until tender; drain + spread on a sheet pan to cool slightly

Using the bottom of a glass, smash potatoes, drizzle with 2-3 tbsp oil + salt/pep; roast 10 min, flip + roast 10-15 min until golden + crispy

Heat 1 tbsp oil in skillet over med-high; pat steak dry, season with salt/pep + sear 3-4 min per side for med-rare; for best results, use tongs to hold steak up on edges 1 min to render fat crispy; rest 5 min + cut into ½-inch slices; add to plates + drizzle green goddess over the potatoes—nice work!