Sinigang na baka (beef sinigang)

Ingredients

• 800 g beef brisket or 1kg beef ribs, cubed
• 1 large red onions
• 1 packet sinigang (tamarind) mix
• 2 medium tomatoes, chopped
• 8 pieces small taro
• 200 g okra medium sized, cut into two
• 1 bunch string beans
• water
• fish sauce
• pepper