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 more well done add 1-2 min per side); for best results, use tongs to hold steak up on its edges for 1 min to render fat crispy; rest 5 min + slice in half; set aside

Meanwhile, cut onion in half from root to stem, peel + thinly slice ½ of onion

Slice asparagus into ½-inch pieces, keeping tips whole; heat 1 tbsp oil in skillet over med-high, add asparagus + onions with salt/pep; sauté 4-6 min until veggies are tender + asparagus is bright green

Divide steak + veggies to plates