Fraise de Veau à la Lyonnaise (Calf's Mesentery à la Lyonnaise)

Ingredients

• fraise de veau
• oil
• sliced onions
• butter
• chopped parsley
• vinegar

Instructions

1. If the fraise is prepared specially for this dish, keep it a little firm.
2. Blot it well dry, slice it thinly and season it.
3. Sauté it in smoking oil.
4. Add a relative quantity of sliced onions, sautéed and cooked in butter beforehand.
5. Sauté the two together for a few minutes to mix them well.
6. Arrange in a timbale, sprinkle with a little chopped parsley and moisten with a dash of vinegar swirled in the burning-hot pan.