Posh sausage sambos

Make caramelised onion.

Cook sausages in heated oiled large frying pan until browned all over and cooked through. Cool then halve sausages lengthways.

Meanwhile, split bread lengthways; spread top with relish, spread base with caramelised onion then top with sausage halves and watercress; press bread top on firmly. Wrap sandwich in plastic wrap or foil. At the picnic, cut sandwich into eight slices.

Caramelised onion Heat oil in large frying pan; cook onion, stirring, over low heat, about 10 minutes or until soft. Add sugar and vinegar; cook, stirring, about 10 minutes or until onion is caramelised. Cool.