I don't eat many potatoes; I basically only like french fries and breakfast potatoes, and then only when done right. To me, "done right" means crispy and bit spicy. Here's one way to make that happen.
You'll need a pan that can go in the oven - I use cast iron. Preheat the oven to around 400 degrees while you get everything together. Start by cubing a few potatoes (I actually used one huge one) and slicing an onion. The way I slice the onion for this is to cut it in half, and then do the slicing, so you end up with long onion string.
Get your pan nice and hot, add a little more oil (I used bacon fat, but we'll pretend this is a vegetarian dish). and start the potatoes and onions cooking.