Nyonya Style Steamed Red Tilapia

1 Red Tilapia fish (500gm to 1kg weight)
1 tbspn cooking oil
2 or 3 tbsp chili paste
1 large green onion, thinly slice
2 stick lemongrass, thinly slice
1 ginger flower, thinly slice
3 cloves garlic, thinly slice
2 tomatoes, cut into 4
1 tbsp dried shrimp
1 cube fish stock
1 liter plain water
Water (if needed)
Pinch of salt and pepper
Chopped Chinese celery

1. Heat your large cooking pan and add the cooking oil.
2. Fry the slice green onion, garlic, until it get brown. 
3. Add the ginger flower, dried shrimp and lemongrass, stir gently
4. Add the chili paste and let it cook for awhile by stirring
5. Add fish stock and the fish into the pan. Make sure the water cover 2/3 of the fish and cover the pan with a lid.
6. After 10 minutes, turn the fish to another side and simmer for another 5 minutes.
7. Turn off the fire and add the tomatoes into the steam mixture. 
8. Move the steam fish and the juice to your serving plate and garnish with chopped Chinese celery