Preparation. Stir 1/2 cup water into sauce to thin it. Toss pasta with olive oil and allow to cool slightly before tossing with 2 cups sauce. Distribute 4 generous cups of pasta on bottom of timpano. Top with 1 cup salami, 1 cup provolone, 3 eggs, 1 cup meatballs and 1/3 cup Romano cheese. Pour 2 cups sauce over ingredients.
To remove the timpano from the pan, place a baking sheet or thin cutting board that’s large enough to cover the entire diameter of the pan on top of the timpano. Grasp the baking sheet or cutting board and the rim of the timpano pan firmly and invert the timpano. Remove the pan and allow the timpano to cool for 30 minutes more.
Fold the pasta dough over the sausages and cover with the lid. Bake for 45 minutes, then remove the lid and bake for 30 minutes more. Cool for at least 30 minutes. Invert the timpano onto a cutting board and cool for 10 more minutes before cutting. Serve with marinara sauce.
Greasing and lining the pan with the dough may be done while the pasta is cooking. The meat used in preparing the ragu is generally served for dinner the night before the timpano is baked, because no one has room for anything other than salad after eating timpano.