Hi!, El Cosaco is a Russian restaurant. Here are a couple of other options:
La Galette: Conde de Aranda, 11. +34 91 5760641. Metro: Retiro
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"Its interior decor and atmosphere is a successful attempt to recreate the High Romantic period with its candlelight and baroque music. It certainly brings in a sophisticated clientele in their 30s and 40s. This restaurant offers an interesting vegetarian menu with a few meat dishes for the less orthodox. The salads and rice dishes are excellent and the famous house specialities are Austrian desserts and apple croquettes. There's another branch on Bárbara de Braganza, 10." (
www.casaescondida.net)
or
Maldeamores: Don Pedro, 6. +34 91 3665500. Metro: La Latina. Average price: 40 euros
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"You'll find this sophisticated, intimate and attractively decorated restaurant hidden away in a quiet corner of the old town. It's an ideal place for courting couples to share a romantic meal. Its Argentine owners have opted for a menu featuring pasta dishes, salads and rich French sauces. The house speciality is magret of duck with a dressing of balsamic vinegar, brandy and honey. Strangely enough the kitchen serves up sushi as well. There's a good selection of wines and beers to choose from."
Enjoy!