• Penne with Mozzarella and Spicy Tomato Sauce: Use 1 pound fresh mozzarella, cut into 1/4-inch cubes, in place of the shrimp. Toss the cheese in at the end.
• Penne with Sausage and Spicy Tomato Sauce: Use grilled sausage cut into bite-size pieces in place of the shrimp. Toss the sausage into the pasta with the tomato sauce.
• Penne with Grilled Vegetables and Spicy Tomato Sauce: In place of the shrimp, use grilled or sautéed vegetables such as mushrooms, zucchini, eggplant, or green beans, cut into bite-size pieces. Toss the vegetables into the pasta with the sauce.
With its competing spices, strong-flavored cilantro, and acidic tomatoes, this pasta dish calls for a simple Italian white—a Pinot Grigio, for example.