Saute the onion in olive oil. Cut the baked potatoes into 1 inch cubes (please note the potatoes must be cooked!). In a plastic container such as a tupperware (must have a tight fitting lid) pour in a few tablespoons of olive oil and add the cubed potatoes. Shake the mixture until the potatoes are covered in oil. Then add your seasonings (you can get creative here with your seasonings, I added basil oil once which was excellent) and give the mixture a shake again until the seasonings have covered the potatoes. Next, add the potatoes to the onions which by now should be translucent and slighty browned. Mix well and let sit for 10-15 minutes over low-medium heat (it is important not to stir them during this time), then flip them over and let them sit another 10 minutes or until both sides are nice and crispy brown. ENJOY!