Chop the cilantro and the parsley together. Crush the garlic and slice the onion really thinly. Zest your limes and juice them as well. Chop your chili finely as well. Mix everything together. Season with salt and pepper. It should taste fresh and a little bit spicy
Clean your fish, remove any bones or scales and place the cleaned fillets into the ceviche. Place in the fridge
"cooking" the fish will take approximately 15-30 minutes depending on the size of your fillets. You'll see soon enough when it is cooked sufficiently. Eat straight away as the fish will continue cooking and yes, can become overcooked as well!