Preparation Squeeze spinach dry. Transfer spinach to large bowl. Add ricotta, 1/2 cup Parmesan, fennel, basil and garlic to bowl. Season mixture with salt and pepper; blend. Preheat oven to 350°F. Spoon 1/2 cup marinara sauce evenly over bottom of 9x13x2-inch baking dish. Fill each pasta shell with spinach mixture. Place shells, filling side up, in dish. Spoon remaining sauce over shells. Sprinkle with remaining 1/2 cup Parmesan. Cover loosely with foil and bake until heated through, about 30 minutes. Serve, passing additional Parmesan separately.
Preparation Squeeze spinach dry. Transfer spinach to large bowl. Add ricotta, 1/2 cup Parmesan, fennel, basil and garlic to bowl. Season mixture with salt and pepper; blend. Preheat oven to 350°F. Spoon 1/2 cup marinara sauce evenly over bottom of 9x13x2-inch baking dish. Fill each pasta shell with spinach mixture. Place shells, filling side up, in dish. Spoon remaining sauce over shells. Sprinkle with remaining 1/2 cup Parmesan. Cover loosely with foil and bake until heated through, about 30 minutes. Serve, passing additional Parmesan separately.