Poached duck egg with hot smoked salmon mustard hollandaise

Name: Poached duck egg with hot smoked salmon & mustard hollandaise
Ingredients: 2 x 150g pieces hot smoked salmon; 4 duck eggs; splash of white wine vinegar; 60g watercress; a little rapeseed oil; 2 breakfast muffins, cut in half and toasted; 250g butter; 30ml cabernet sauvignon; 30ml white wine vinegar; 20ml double cream; 2 large egg yolks; 1 tsp snipped chives; 1 tsp wholegrain mustard; ½ lemon, juiced