Troubleshooting How do I cut onions with the Philips HomeCooker? You can achieve the best results by using the julienne disc for cutting onions with your Philips HomeCooker. Just watch our short video or follow the instructions below. Instructions Cut the onion into halves and then cut each half vertically. Start the cutting tower with speed 1 and put the onions into the feeding tube. Use the pusher to direct the onions into the feeding tube, but do not press firmly. Play Pause You need Flash to see video. Click here to download it.