Combine the semolina flour and egg in a bowl. Gradually add the water a little at a time and knead into dough. Once the dough comes together and the surface becomes smooth, cover it with plastic wrap and let it rest in the refrigerator for 30 minutes.

Dust the dough with the flour from Step 1 (either semolina or bread flour, not listed), and evenly roll it out to a 1-2 mm thickness with a rolling pin. Cut the dough into desired sizes or shapes (if it is for lasagna, cut it into rectangles or squares).

In a pot of boiling water, add the salt and vegetable oil or olive oil (to prevent noodles from sticking to each other), boil the noodles 3-5 minutes after they rise to the surface. The boiling time will vary depending on the thickness of the noodles.