Cook 2 chopped shallots in a skillet with 2 tablespoons butter over medium heat, about 3 minutes. Add 3/4 cup heavy cream, 2 cups Perfect Marinara Sauce and a pinch of red pepper flakes; heat through. Stir in 1/4 cup grated parmesan and 1 to 2 tablespoons vodka; season with salt. Toss with penne.
Photograph by Kang Kim