Add 2 tablespoons salt to boiling water. Carefully add manicotti tubes to water and cook for 2 minutes less than package instructions indicate. Drain and submerge the pasta in ice bath to stop the cooking. When pasta has cooled, drain again and set aside.
Place cooled meat mixture in a large mixing bowl, and add prosciutto cotto, eggs, 1 cup of the grated Pecorino Romano cheese, parsley, ricotta and breadcrumbs. Mix gently but thoroughly. Season with salt and pepper to taste.
Using a piping bag or small spoon, carefully stuff filling into pasta tubes. Place half of stuffed pasta in oiled lasagna pan, arranging them in an even layer across the bottom. Spread 11/2 cups tomato sauce over pasta, and sprinkle with 1/4 cup of grated cheese. Place remaining stuffed pasta over the first layer, like a pile of logs, and spread remaining sauce over them. Sprinkle with remaining 1/4 cup cheese. Bake in oven for 20 to 25 minutes, until golden brown and crispy on top. Remove, and allow manicotti to rest for 5 minutes before serving.
Nutrition information per each of 10 servings:
Calories1,067Fat44 gSodium1,540 mg
Carbohydrates97 gSaturated fat18 gCalcium370 mg