Note Canned Spanish tuna belly is available from Simon Johnson and select Spanish delicatessens.
"This is an everyday salad, but it's really good," says Camorra. "In summertime it's something I always have sitting in the fridge ready to go. Make a big pile of it. It goes really well with fish, and it's got magnificent-quality tuna belly from a can that's juicy and flavoursome. I put eggs in it too; they almost make it a meal in itself."