Step 1

Heat the oven to 400 degrees. Bring a large pot of salted water to a boil over high. Turn down to medium-high, and cook the pasta according to package instructions until 2 minutes short of al dente (the pasta will finish cooking in the oven). Drain and reserve.

Step 2

Meanwhile, heat the oil in a large skillet over medium. Add the garlic and red-pepper flakes and cook until fragrant, about 1 minute. Add the spinach little by little until wilted, stirring frequently, about 3 minutes. Stir in the chopped artichokes.

Step 3

Stir in the cream and bring to a simmer over medium-high heat. Stir in the Parmesan until melted. Remove from the heat then carefully stir in the cooked pasta, or transfer to a large bowl to mix together, if necessary. The liquid might appear wet and loose, but it will thicken up as it bakes. Season to taste with salt and pepper.

Step 4

Transfer the pasta to a 2-quart casserole dish or individual casseroles or ramekins. Sprinkle with the mozzarella and bake until bubbling, 20 to 25 minutes. Broil until browned in spots, 1 to 2 minutes, if desired. Let cool slightly before serving.