How do you properly parboil potatoes before roasting them in the oven?

To properly parboil potatoes before roasting them in the oven, first peel and cut the potatoes into evenly sized pieces. Place them in a pot of boiling water and cook for about 5-7 minutes until they are slightly tender but still firm. Drain the potatoes and let them cool before roasting in the oven with oil and seasonings until they are crispy and golden brown.