Smoked Salmon Pancakes with Caviare

Name: Smoked Salmon Pancakes with Caviare (Crêpes parmentier au saumon fumé et au caviare)
Yield: For four people
Cuisine: French
Ingredients: 200 g (7 oz) butter, clarified; 250 g (8½ oz) potatoes, peeled; 2 tablespoons milk; 1½ tablespoons plain flour; 1½ eggs; 2 egg whites; 1½ tablespoons double cream; 150 g (5½ oz) smoked salmon, thinly sliced; 150 ml (¼ pint) whipping cream; 50 g (2 oz) caviare (optional); 1 tablespoon chives, finely snipped; juice of half a lemon; salt, freshly ground pepper; salt, freshly ground pepper