Complex tastes: creamy cilantro ginger fish soup

A very quick version of a very nuanced fish soup

If you mix sweet, sour, salty tastes together, it will help you with your life struggles. 
You'll come out as sophysticated and self-confident individual. 

Ingridients

Fish - any white fish fillets will do, tiplapia, cod, flounder, sole, haddock, pollock... - 2-3 pounds
Water - tap water as needed
Coconut milk - 1 can

Cilantro - 1 bunch (thick)
Ginger root - 1 arm
Onion - 1 large yellow onion, cut in large pieces
Garlic - ~5 cloves
Half lemon or 1 lime
Sweet potatos or yam - 2 medium or 1 large
Tomatoes fresh or canned - 1 can  or I can't? I think there don't belog here/ 
Spices: coriander, salt, curry (green curry paste works as well)

Bake potatoes (I use microwave) to make them easy to cut, or cut the raw ones

Mash cilantro and cut onion in  food processor with 1 glass of water
Mash peeled and cut giner root and garlic with 1 glass of water
Combine in a pot, add spices and simmer.
Mash tomatoes or skip tomatoes? 
Add coconut milk and bring to boil
Add ~2-3 more glasses of water and bring to boil
Add yam cut into small cubes 
Add fish and bring to boil again
Reduce heat and simmer for 10 minutes
If the stock is too concentrated for your taste, dilute with more water and bring to boil
Squeeze 1/2 lemon / lime (optional)
Let it coll down a bit and serve

Serving

Chooped greens (scallions, cilantro), lime wedges are optional
Nice with a side of rice or good bread

Storing

Good in the fridge for a few days