Dover sole fillets with salsify, oysters and caviar

By Matt Tebbutt From Saturday Kitchen Ingredients For the sauce 100g/3½oz unsalted butter 2 shallots, peeled and finely chopped 200ml/7fl oz Sauternes or other French sweet wine 100ml/3½fl oz light chicken stock 100ml/3½fl oz fish stock 100ml/3½fl oz double cream 1 tsp caviar …