Preheat Your Oven: Begin by preheating your oven to 350°F (175°C). This ensures your dish bakes evenly!
Prepare the Biscuits: Open the can of Homestyle refrigerated biscuits and separate them. Cut each biscuit into 6 pieces and place them in a large mixing bowl.
Mix in the Goodies: Add the frozen cooked Italian meatballs, sautéed green bell pepper, and marinara sauce into the bowl. Gently stir until everything is well coated with the sauce.
Transfer to Baking Dish: Pour the mixture into an ungreased baking dish, spreading it out evenly across the bottom.
Add Cheese: Sprinkle the shredded Italian cheese blend generously over the top of the mixture, ensuring a cheesy crust.
Bake: Place the dish in the oven and bake for about 35 minutes. Keep an eye on it: it’s ready when the biscuit pieces are puffed up and the cheese is melted and golden brown.
Finish with Flavor: Once baked, remove from the oven and sprinkle with grated Parmesan cheese. If desired, add a garnish of fresh basil for a burst of flavor.
Serve and Enjoy: Allow it to cool for a few minutes before serving. Enjoy your Meatball Sub Bubble-Up Bake with family and friends!