Preheat to 475° + add sheet pan to oven; cut taters into ½-inch sticks, mix with 2 tbsp oil + salt/pep; remove pan from oven, spread fries onto pan + bake 15 min; flip, reduce heat to 425° + bake 10-15 min til golden

Meanwhile, heat 1 tsp oil in skillet over med; thinly slice ½ onion + sauté 8-10 min til brown; add salt + 2 tbsp water, cover + cook 3-5 min til soft; set aside

Heat lightly oiled skillet over med + season burgers with salt/pep; cook 5 min on one side, then flip over, divide onions + top burgers; add 2-4 tbsp cheese to each, cover + cook 2-3 min more til cooked through + cheese has melted; toast 2 buns + add burgers to buns