Preheat the Oven: Preheat your oven to 375°F (190°C).
Cook Noodles: Cook the egg noodles according to the package instructions. Drain and set aside.
Sauté Onion and Garlic: In a skillet, melt the butter over medium heat. Add the finely chopped onion and minced garlic and sauté until translucent.
Cook Meatballs: Add the pre-cooked Swedish meatballs to the skillet and heat them through.
Make the Creamy Sauce: Stir in the cream of mushroom soup, sour cream, and beef broth to the skillet. Mix until well combined and the sauce is creamy.
Combine Noodles and Meatballs: Combine the meatball mixture with the cooked noodles and transfer the mixture to a baking dish.
Add Cheeses: Sprinkle the mozzarella and Parmesan cheeses evenly over the top of the dish.
Bake: Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the top is bubbly and golden brown.
Garnish and Serve: Remove the dish from the oven and garnish with freshly chopped parsley before serving
