Preheat oven to 400°; boil a large pot of salted water, add half the box of pasta + cook 10-12 min or until al dente, then drain + return to pot

Lightly oil a small baking dish + spoon a ¼ cup marinara onto bottom; top with 1 1/3 cup pasta, ¼ cup spinach artichoke dip + 1 cup spinach; repeat layers 2 more times; top casserole with ¼ cup marinara + sprinkle on ¼-½ cup mozzarella; cover with foil

Bake pasta for 10-15 min until sauce is bubbling, remove foil + bake 10 min more until cheese is melted—that looks so good!