Matjes Herring in Apple and Dill Soured Cream Dressing

Name: Matjes Herring in Apple and Dill Soured Cream Dressing
Cuisine: Swiss
Ingredients: 6 fresh matjes herring fillets; ½ eating apple, peeled and cut into segments; 2 small pickled gherkins, sliced; 2 shallots, peeled and sliced; 1 small pot soured cream; 15 ml (1 tablespoon) cotton tofu; 5 ml (1 teaspoon) Dijon mustard; juice of ½ lemon; 15 ml (1 tablespoon) finely snipped fresh dill; salt and freshly ground pepper; salt and freshly ground pepper; 1 small cooked beetroot, cut into thin slices; 15 ml (1 tablespoon) vinaigrette; a pinch of sugar; 250 g (9 oz) new potatoes, scrubbed and boiled