Wipe mushrooms clean + thinly slice; heat 1 tbsp oil in skillet over high, add mushrooms + cook undisturbed 3 min; sauté another 3-4 min until browned + tender; season with salt/pep + set aside

Heat lightly oiled large skillet over high; cook burgers with salt/pep 3 min on one side; flip over, cook 2 min, then add 2 slices cheese to each burger; cover pan + cook 1-2 more min until cooked through, no pink remains + cheese has melted

Chop, wash + dry lettuce; add to a large bowl with 1 tbsp oil, salt/pep + a splash of vinegar; toss thoroughly

Toast 2 buns until warm + golden, then top with burgers + mushrooms; serve salad on the side—nicely done!