Chop and mash chicory, place it in the warm water to make soft and less bitter. Dice finely peeled onion. Slice finely bacon and fry in a dry pan until crispy crust. Whisk the vegetable oil, white wine vinegar and sugar. Drain chicory, dry. Combine onion, chicory and dressing in a bowl, pepper and salt to taste, sprinkle with fried bacon.