Meatball & Creamed Spinach Skillet

Prepare meatballs according to package directions.

Meanwhile, heat oil in a large, broiler-safe skillet over medium heat. Add onion and cook, stirring occasionally, until tender, about 2 minutes. Add garlic and cook, stirring, for 30 seconds. Add spinach and cook, stirring occasionally, until thawed, 6 to 8 minutes. Sprinkle with flour and stir to combine. Add milk and cook, stirring occasionally, until thickened, about 2 minutes. Stir in pepper and nutmeg.

Nestle the cooked meatballs into the creamed spinach. Drizzle with marinara and scatter mozzarella on top.

Position rack in upper third of oven and turn broiler to high. Broil the casserole until the cheese is browning in spots, 3 to 4 minutes.