[footfootfoot]

Yeah, don't parboil them too long, let them drain thoroughly, toss them in oil. Oil comes in a bottle not a spray can. Be a philanthropist with the oil and a miser with the vinegar.
Make sure your oven is fucking hot 400-450f
then put the taters in.

Also don't toss them in oil until just before going in. For an extra delicious effect, mix some corn starch, smoked paprika, garlic powder and fine salt together, toss the drained parboiled taters in that mix until they are coated, then oil them then bake them.

You are over boiling your potatoes if they get mushy or bits come off them. Be sure to use plenty of water, cut them into even sizes, and the boiling is very brief. I usually skip it.

Also don't use 'new potatoes' use something with a decent skin.

Now get in that kitchen and make us proud!