Add flour and salt to a food processor bowl. Mix water with lye water. Turn on food processor and pour the water into the flour gradually.
Run food processor until dough starts to come together in a ball.
Cover the dough with plastic wrap/cling film or a damp cloth. Leave to rest at room temperature for 1 hour.
Knead the dough for 1-2 mins to make it smoother (Don’t worry if it’s not perfectly smooth). Then divide into four portions.
Use your hands or a rolling pin to flatten one piece of dough (cover the rest to prevent drying) until it’s thin enough to go through your pasta maker on the widest setting.
Feed it through the machine. Then fold the dough lengthway and repeat the procedure another couple of times.
Reduce the thickness setting. Pass the dough through twice. Then repeat the process while reducing the setting one number up at a time until the dough reaches the desired thickness. My Kitchenaid pasta maker has settings from 1 to 9, I stop at 5
Dust the dough sheet with a thin layer of corn starch (or other types of starch) to prevent the noodle strands from sticking.
Pass the dough sheet through spaghetti cutting attachment to produce noodles.
Bring a large pot of water to a full boil. Add the noodles. Once the water comes back to boil, cook for a further 1-2 mins. Taste one strand to check the doneness (Do not overcook).
Rinse the noodles under running water for a few seconds then drain well. Serve with a sauce, toppings or in a soup (if serving as a cold dish, rinse until cooled).
Place uncooked noodles in sealed bags/containers. Store in the fridge for up to 5 days, or in the freezer for 3 months.
Cook the usual way. No need to defrost if frozen.