Cook potatoes with skin in salted water for 20 minutes. Drain. Leave to cool. Peel asparagus, cut off ends and cut into 3 cm long pieces. Cook the asparagus with 1 tsp. sugar in salted water for 10-12 minutes.
Drain, collecting 200 ml asparagus water.
Peel the potatoes and cut into ½ cm thick slices. Put potatoes and asparagus in a bowl. Mix asparagus water with 1 tbsp vinegar, salt and pepper and pour over the vegetables. Mix carefully and let cool.
Cut the pomegranate in half. Squeeze the juice of one half. Remove the seeds from the second half. Mix pomegranate juice with 1-2 tbsp vinegar, 1-2 tsp sugar, salt and pepper. Stir in 6 tbsp. olive oil bit by bit.
Clean, wash and spin-dry the rocket.
Dab the scallops dry. Heat 2 tablespoons of oil with butter in a frying pan. Fry the scallops on each side over medium to high heat for 2 minutes, season with sea salt and pepper. Mix salad with rocket and serve with pomegranate vinaigrette and the scallops.