Place rack in top third of oven, add sheet pan + preheat oven to 475°; peel (or don't peel!) potatoes, cut into ½-inch sticks, mix with 3 tbsp oil + salt/pep; add fries to hot pan + bake 15 min; flip fries over, reduce heat to 425° + bake 10-15 min more until golden

Meanwhile, heat lightly oiled skillet over medium; cook burgers 10 min, flipping every 1-2 min to avoid burning until hot + fully cooked; remove from heat, top with 1 slice of cheese + cover until cheese melts, about 1 min

Heat a clean skillet over med-high; working in batches, heat 4 cauliflower sandwich rounds 30 sec per side or until warm; add burgers to rounds with fries on the side