Cut cucumber into half rings, tomatoes into slices, pepper into strips.
Lay out a flat dish with lettuce leaves. Transfer the remaining salad by hand into small pieces in a deep bowl.
Add cucumber and bell pepper.
Add the corn and stir.
Cut the squid from the sea cocktail into long strips into pieces.
Add seafood to the salad.
Cut the tomatoes into slices and add them to a bowl. Pour in a little vegetable oil and brine from the sea cocktail, mix everything carefully.