L'Amore Rigatoni alla Vodka

6 ounces rigatoni, cooked according to package
    directions, drained and kept hot
3 shallots, finely chopped
3 tablespoons extra-virgin olive oil
1 tablespoon butter
1/4 cup vodka
3/4 cup tomatoes, finely chopped
1/4 cup cream
1 tablespoon dried tarragon
2 tablespoons Parmesan cheese, grated
Salt and pepper to taste

Heat butter and olive oil in a frying pan. Add shallots; saut