6 small beetroots, scrubbed clean and leaves removed
knob of horseradish, grated, plus extra to serve
1 lemon, zest and juice only
1 orange, zest only
100g/3陆oz mixed herbs (i.e. lemon verbena, tarragon, thyme)
50驳/1戮辞锄 watercress
salt and freshly ground black pepper
150驳/5陆辞锄 caster sugar
2 tbsp olive oil
drizzle of olive oil, to serve
300g/10陆oz coarse salt
1 trout fillet (or use ready-smoked trout and skip the curing stage)
4 slices rye bread