To prepare the swordfish panini with arugula, you'll need: 1/2 cup romaine lettuce, 2 tablespoons olive oil, 1/2 teaspoon kosher salt, and 1/4 teaspoon pepper. Toss the lettuce with the ricotta cheese. Spread the pesto on one side of each slice of bread. Drizzle the remaining oil on top. Bake the bread in the oven for 12 to 15 minutes, or until the cheese is melted. Serve with lemonade.