Easy, Cheesy Tortellini Bake

Preheat the oven broiler; adjust an oven rack to the highest position. Generously butter or grease an 8x8-inch baking dish.

Bring a large pot of lightly salted water to a boil. Add tortellini and cook according to package directions; drain and set aside.

Bring marinara and Alfredo sauces, spinach, and 1 tablespoon Italian seasoning to a simmer in a large saucepan over medium-high heat. Reduce heat to medium-low and simmer for 10 minutes.