preheat oven 350° .. cut potatoes in fours.. rinse..spray baking tray with cooking spray then place potatos onto baking tray

drizzle olive oil over potatos

sprinkle rosemary

put into oven for a total of 1 hour .. stirring occasionally so the potato doesn't stick...

when you hit the hour sprinkle parmesan cheese over potatoes baking for another 20 mins.. stir occasionally .. when done cheese will be crunchy golden brown