Add Sablefish to a bowl with the diced onion
Add lime juice to cover. Refrigerate till fish is “cooked” (about 4 hours)
Drain lime juice off in a colander or strainer
Mix tomatoes, jalapeño, minced cilantro, olives and olive oil in a bowl
Stir in the fish and onion.
Season to taste with salt...yes taste it. Add more if needed
Add the orange juice and beer (and sugar if needed)
Just before serving, gently fold in the avocado. Garnish with cilantro leaves and enjoy.