Step 1

Microwave the spinach according to the package instructions, then allow to cool slightly. Squeeze out the excess water with a kitchen towel and set aside.

Step 2

Bring a large pot of heavily salted water to a boil. Add the rigatoni and cook 2 minutes less than the package instructions. Reserve 1 1/2 cups of the pasta water before draining.

Step 3

In a large room-temperature saucepan, add the olive oil and garlic. Turn on the heat to medium and allow the garlic to cook until lightly browned, 1 to 2 minutes. Add the crushed red pepper flakes, then add the spinach and artichokes and saute 2 to 3 minutes. Add about 3/4 cup pasta water and the cream cheese and dried basil to the saucepan and allow the cream cheese to melt, 3 to 4 minutes. Add 1/4 to 1/2 cup more of the pasta water if necessary to thin out the sauce, and season with salt and pepper. Stir in the grated Parmesan.

Step 4

Add the rigatoni to the sauce and stir to coat. Transfer to a 9-by-13-inch baking dish (if your pan is oven-safe, you can skip this step). Top with the shredded mozzarella. Broil on high until the cheese is bubbly and golden brown, about 5 minutes. Serve immediately.