Heat oil in large pot. Add shallots and garlic and saute until beginning to soften, about 3 minutes. Add sausages removed from casings, and saute until no longer pink, about 5 minutes. Add cream, simmer 5 minutes. Add tomatoes with juice. Add sage. Simmer until sauce thickens, stirring occassionally, about 15 minutes.
2
Meanwhile, cook pasta al dente. Drain, reserving 1/2 cup of liquid.
3
Return pasta to the same pot. Add sauce. Toss over medium heat until sauce coats pasta, adding reserved liquid if dry. Season with salt and pepper. Transfer to bowl. Sprinkle with cheese and serve.