Thon à l'Italienne (Braised Tuna, Italian Style)

Ingredients

• a piece of tuna
• lemon juice
• oil
• aromatics
• 1 large onion
• 5 shallots
• 125 grammes raw mushrooms
• white wine
• Fonds de Poisson
• beurre manié

Instructions

1. Marinate the piece of tuna 1 hour in advance with lemon juice, oil and aromatics.
2. Sponge the piece dry and brown it in oil.
3. Add 1 large onion, 5 shallots and 125 grammes of raw mushrooms, each chopped separately.
4. Stew for 20 minutes.
5. Moisten to two thirds the height of the piece with white wine and Fonds de Poisson, and braise for a good hour.
6. At the moment of serving, thicken the cooking liquor lightly with beurre manié.