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800 g de joue de buf
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1 petit poireau
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2 belles carottes
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2 petits oignons paille
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2 échalotes
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2 gousses d'ail
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1 côte de céleri-branche
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50 cl de vin rouge (Bergerac)
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3 cuillères à soupe d'huile d'olive
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40 g de beurre
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1 boîte de concentré de tomates (70 g)
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1 cube de bouillon de buf
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1 carré de chocolat noir
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1 demi-cuillère à café de thym
de Provence
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Sel fin, poivre du moulin