Start by combining semolina flour and a small amount of water in a bowl. Mix with your hands until it’s a smooth, but firm consistency. It should feel like very stiff play-dough.
Once the flour and water are combined, knead by hand it to make the pasta dough relax. When it’s kneaded enough, it should look silky. If you’re making a lot of pasta, you’ll want to cover your dough with a damp cloth so that it doesn’t dry out.
Cut off a small chunk of dough. Using your two hands, roll a long thin cylinder from the dough (about the diameter of your pinky finger - try to keep the thickness as uniform as possible). Cut off each end and discard them.