Preheat an oven to 375F.

In a large pot of boiling salted water, cook the pasta to al dente. Drain. Set the pot back on the stove over medium-high heat.

Remove the sausage from the casings. Crumble the sasusage into the pot. Brown, breaking it up in to smaller pieces using a wooden spoon or other implement. Add the sauce and simmer for 5-10 minutes. Add the pasta to the pot and toss to combine.

Add 1/3 of the pasta to the bottom a 9" nonstick springform pan. Arrange half the pepperoni slices over the pasta, then top with 1/3 of the cheese. Repeat.

Top the second layer with the remaining pasta. Cover with foil and bake for 30 minutes. Remove the foil, add the remaining cheese and bake for another 15 minutes.

Remove from oven and allow to cool slightly and "set", about 20 minutes, before cutting and serving.