This recipe for rigatoni alla rescigno with crab bruschetta is courtesy of John Sierp.
Combine flour, garlic, oregano, sea salt, and cracked black pepper in a shallow dish; dredge chicken in flour mixture. Heat olive oil in a Dutch-oven over medium-high heat. Add chicken in batches; saute until golden brown, about 3 minutes per side. Drain on paper towels; set aside.
Using the same pan, brown pancetta over medium-high heat. Add mushrooms, shallots, and garlic oil; cook until shallots are translucent. Add chicken stock 1 tablespoon at a time to prevent sticking, if necessary.
Increase heat to high; add sherry, and stir with a wooden spoon to scrape browned bits from bottom of pan. Cook for 2 minutes.
Add tomatoes, red pepper, if using, remaining chicken stock, and half of the basil; season with salt and pepper. Reduce to medium-low heat, and cook until sauce begins to thicken, 40 to 50 minutes.
Meanwhile, bring a large pot of water to a boil; season with salt. Add rigatoni, and cook according to package instructions. Drain; set aside.
Stir cream and remaining basil into the sauce; season with salt and pepper. Transfer rigatoni to a large serving dish; top with chicken, and pour sauce over. Sprinkle with cheese, and serve with bruschetta, if desired.