Put the 1.7 liters of water into a large pan with the three stock cubes and bring to the boil.
Meanwhile, put the olive oil into a separate pan, add onion and cook slowly without coloring. Add the mussels and the white wine. Cover the pan and cook until the mussels have opened. Set the mussels aside.
Turn up the heat and add the rice to the pan. The rice will start to fry so it is important to keep stirring. When it starts looking transparent, add a good ladle of stock. Again, it is important that the rice does not cook too quickly, so keep stirring and reduce heat to medium. Keep adding ladlefuls of stock until there is none left. Make sure that the previous ladleful of stock is absorbed before adding the next one.
After 18 minutes, the rice should be “al dente” – still a little firm. Remove from heat and add squid, shrimp and mussels.
Chef's Tip
To serve, divide the risotto between the plates and drizzle with some lemon juice and Espelette pepper.