Madras Meat Curry

• 4 green cardamom pods
• 3 green chiles
• 2 dry chiles (red)
• 2 garlic (cloves)
• 1 gingerroot (fresh grated)
• 700 gr beef round steak
• 65 gr tamarind nectar
• 60 ml water
• 30 ml vegetable oil
• 6 gr turmeric (ground)