Add the tomatoes and onion and let it cook until its sort of soft
Put the tamarind mix and let it simmer for about 2 minutes
Add the vegetables... I made a mistake because i added the brocolli.. Only add the eggplant and mushroom. Let it simmer for about 2 min
Add the shrimp and the and spinach
Let it cook for about 4 minutes or until shrimp is completely orange
Voila! You now have sinigang na hipon!