BAKED PASTA W/ SAUSAGE AND FOUR CHEESES

2 pounds pasta, rigatoni or other
1/4 cup pancetta, very thinly sliced, if you can't find pancetta, use regular bacon
2 1/2 pounds Italian sausage, casing removed, hot or sweet
1 onion, chopped
1 carrot, chopped
8 ounces mixed mushrooms, sliced
3 tablespoons julienne basil
3 tablespoons chopped parsley
3 pounds ricotta
1/2 cup heavy cream
1 cup chicken stock
2 cups grated provolone cheese
1 1/2 cups crumbled Gorgonzola cheese
1 28 ounce can Italian plum tomatoes, drained and chopped
1 1/2 cups grated pecorino Romano cheese or Parmesan

Cook pasta in a large pot of boiling, salted water until only halfway cooked, according to package directions. Drain, and rinse under cold water to stop cooking. Toss with a minimal amount of olive oil to prevent sticking. Cook pancetta or bacon in large skillet over medium heat until well browned, and crisp, stirring occasionally, about 10 minutes. Drain on a paper towel. Add sausage to drippings in skillet and cook, breaking up large pieces, until well browned. Transfer to paper towel. Pour off all but 3 tablespoons drippings from skillet. Add onion, carrot, mushrooms, basil and parsley. Cook until onion is tender, and mushrooms are golden brown. Season with salt and pepper and set aside. Preheat oven to 400F. Spray a large baking pan well with cooking spray. Place ricotta in a large bowl. Gradually whisk in cream. Stir in stock. Add pasta, pancetta, sausage, onion mixture, provolone, Gorgonzola, tomatoes, and 1 cup Romano. Season with salt and pepper and stir well. Transfer to prepared dish. Sprinkle with remaining Romano. Cover and bake 35 minutes. Remove cover and bake an additional 20 minutes, or until very golden brown, and bubbly.

Note:
You can change the cheeses to whatever cheeses you prefer. You can also add any vegetables you might want. Using a variety of mushrooms makes this dish fabulous. You can use any combination that you like.