Wash the green beans and snip the edges. Then in a bowl add olive oil and spices of your choice. Now add green beans and coat them well. Transfer them to a parchment-lined baking tray. Then oven roasts them at 425 0F for 14-15 minutes or until fully done. Do not forget to pull them out at 10 minutes mark and flip all the beans or just shake the baking tray. There you have it. The perfectly sweet and crunchy oven-roasted frozen green beans!