Yeah, just oil them in a bowl, not too much and whack them in a hot oven (about 200c-220c or so), single layer, bit off salt and paprika
Cut them first, then par boil, won't take long and easier to cut them when they are raw.
You can also cut them into wedges and do them the same way, leave the skin on and season with some paprika and oregano, salt and pepper after you par boil, pop in the bag and freeze.

Let them cool though before you freeze them.