Heat 1 tbsp oil in skillet over medium; thinly slice onion + sauté 8-10 min until browned; season with salt + add 2 tbsp water; cover + cook 3-5 min until softened

Heat lightly oiled skillet over med-high; pat meat dry, season with salt/pep + sear, turning every 1-2 minutes to brown 3-4 sides evenly* (for more well done, increase cook time 1 min per side); let rest 5 min, then thinly slice

*The USDA recommends a minimum safe cooking temperature of 145°F for lamb

Slice 2 buns in half; toast until warm + golden; divide lamb + onions to buns then drizzle on 1 container of sauce to each sandwich, yum!