Tartiflettebrûlée

Name: Tartiflettebrûlée
Ingredients: 2-3 medium baking potatoes; 1/2 onion, finely diced; 6 slices bacon or pancetta, diced; 1/3 cup crème fraîche; 2 tablespoons chives, finely sliced; 1 tablespoon butter; 1/4 cup dry white wine; 200 grams Reblochon or soft-washed rind cheese, sliced