Mix the all-purpose flour and semolina flour in a large bowl. Dissolve the salt in water, then add the olive oil. Gradually pour the liquid mixture into the flour. Knead the dough thoroughly until smooth and elastic. Cover it tightly and let it rest for 30 minutes before rolling it out to create the ravioli shell.
- Roll out the dough into thin sheets.
- Place one sheet of dough, spread a layer of mousse filling, then place a piece of seared scallop on top, and spread another layer of mousse.
- Cover with another sheet of dough and gently press the edges to seal.
- Boil the ravioli in boiling water until they float to the surface (about 3–4 minutes). Remove and drain.