Rinse the fish under cold running water and pat dry. Put a large saute` pan with a lid over a medium flame and heat the oil. Add the garlic and the scallions to the pan and saute until the garlic begins to color, about 2 minutes. Add in the red pepper flakes, olives, capers and white wine. Cook for 1 minute and add in the tomatoes. Add the fish fillets into the pan and spoon the sauce over each fillet. Cover and cook for 10-15 minutes or until the fish flakes.