In a small bowl, whisk the first 6 ingredients. On a clean work surface, mix the all-purpose and semolina flours, forming a mound. Make a large well in the center. Pour egg mixture into the well. Using a fork or fingers, gradually mix flour mixture into egg mixture, forming a soft dough (the dough will be slightly sticky).
Lightly dust work surface with flour; knead dough gently 5 times. Divide into 6 portions; cover and let rest 30 minutes.
To make fettuccine, roll each ball into a 10x8-in. rectangle, dusting lightly with flour. Roll up jelly-roll style. Cut into 1/4-in.-wide strips. Cook in boiling water 1-3 minutes.