Trim the top of the fennel (keep any fronds but discard the tops of the stalks). Cut in half, lengthways, on a slant. Then cut into 2mm half-moons, as though you are cutting an onion.
Keep the radish tops if they are very fresh and nice, otherwise trim them. Cut the radishes in half.
Peel the pear, cut in half, remove the core, then cut into 2mm half-moons, like the fennel.
Chop the dill finely.
Mix everything together with the olive oil, vinegar and salt and pepper, and serve straight away.