Peperoni Farciti con Tonno e Acciuga, Lidia Bartianich's Newletter. The combination of sweet, meaty roasted peppers and well-seasoned oil-cured tuna is wonderful! Any fresh, meaty sweet bell-type peppers are suitable, different colors makes a nice presentation. Peppers always taste better when roasted at home but a jar of roasted red peppers can be substituted. The tuna filling is delicious on crostini or crackers: the sandwich, is out of this world!:).