Ingredients for 20 servings

For a nice jar of sweet onion and blackcurrant cream jam:

  1. 500 g peeled onions (Roscoff if you can find them)
  2. 80 g butter
  3. 100 g caster sugar
  4. 5 cl blackcurrant liqueur 20°
  5. 15 cl red wine (Côtes du Rhône or Cahors for example)
  6. 7 cl good wine vinegar
  7. salt and freshly ground pepper