Tip the frozen green beans onto a baking tray lined with baking paper.
Drizzle over the oil, season with salt and any other spices you like, and toss well with your hands.
Spread the beans out on the tray so they are not piled too much on top of each other, and bake in a preheated fan oven at 210°C for about 30 minutes.Turn them 2-3 times along the way. Some will turn completely crisp, others will stay slightly soft - that is exactly how they should be.
Meanwhile, stir together the ingredients for the chilli sauce.
Top the warm bean fries with the chilli sauce and sprinkle with parsley, if you like.