Thoroughly mix all the ingredients except the fish and the quartered lime.
Using a fork and/or your fingers, spread the resulting paste on one side
of each filet.
Marinate the fish overnight (or at least four hours) in the fridge.
Depending on your local climate, you may be able to safely marinate
the fish at room temperature for a shorter period of time.
Cook the fish, unseasoned side down first.
Grilling is ideal (brush oil onto the unseasoned side),
panfrying (in a little oil, covered at medium-high heat until
one side is done, then medium heat uncovered until the other side is)
tastes fine too.
If you're not sure, ask at the fish store how long the fish will
need to cook. Don't overcook.
Serve immediately, with quartered limes for extra citrus flavour.
I like to serve it with rice, stir-fried okra (lightly salted at
the beginning, a dash of soy sauce as they're coming out of the
wok), and fried bananas or plantains (cooked at medium low heat
until one side is caramelized, then flipped until the other side is).