How to Make It
Rinse salt cod, and place in a dish covered with fresh water. Cover and chill at least 24 hours, up to 3 days, changing water at least once.
Drain, rinse, and cut into 3 to 4 large pieces. Place pieces in a medium saucepan, and cover with water to 1 inch above fish. Bring to a boil over high, and reduce to medium. Let simmer until it begins to flake, about 20 minutes. Drain and cool. Set aside.
Preheat oven to 375°F. Brush crostini evenly with 3 tablespoons of the oil; place in a single layer on a baking sheet. Bake in preheated oven until golden brown around the edges, about 7 minutes. Set aside.
Process cod and garlic in a food processor to break up into small pieces. Add heavy cream and lemon juice, and pulse a few times to combine. With processor running, drizzle in remaining olive oil until smooth. Sprinkle with parsley and pepper. Serve spread with toasted crostini.