Preheat oven to 400°; slice ½ the potatoes in ½ lengthwise, mix with 1 tbsp oil, salt/pep + fave spices (we like garlic powder), then spread on a sheet pan cut-side-down; roast 25-30 min until tender

Meanwhile, heat 1 tsp 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 high; cook burgers with salt/pep 2-3 min per side until cooked through + no pink remains

Toast 2 buns until golden; divide burgers between buns with onions + a handful of arugula; serve alongside potatoes—enjoy!