In a skillet over low heat, sweat the onions in the olive oil until very soft, about 10 minutes. Add the garlic and continue to cook until fragrant, about 10 minutes. Add the olives, capers, pine nuts, and paprika and continue to cook gently over low heat for 1 minute.
In a mixing bowl, combine the onions, olives, and pine nuts with the tuna and goat cheese and