
In a large bowl, combine the semolina flour, all-purpose flour, 1 teaspoon salt, eggs, and 1 tablespoon olive oil. Mix until a shaggy dough forms, then knead for about 7 minutes until smooth and elastic.



Lightly oil a clean bowl, place the dough inside, and turn it to coat. Cover and let it rest at room temperature for 35 to 45 minutes.


While the dough rests, prepare the sauce ingredients. Remove the seeds and ribs from the bell peppers, then cut them into strips and slice diagonally into diamond-shaped pieces. Dice the onion and slice the smoked sausage on the bias.



Melt the butter in a large pot over medium heat. Add the sausage, onion, and both peppers, then cook for 8 to 10 minutes, stirring occasionally, until the vegetables soften and the sausage is heated through.



On a lightly floured surface, divide the dough into manageable portions. Roll each piece very thin, then cut it into irregular diamond or rhombus shapes to make maltagliati. Place the cut pasta on a floured sheet of parchment so it does not stick.



Bring the water to a boil and season it with salt and the remaining olive oil, if using. Cook the pasta in batches until tender, about 2 to 4 minutes, then drain. Stir the Alfredo sauce, ricotta, Parmesan, mozzarella, and cheddar into the sausage mixture and cook until melted and creamy. Spoon the sauce over the pasta and serve hot.


