Creating the Cheesy Loaded Meatloaf Casserole is as easy as following these simple steps:

1. Preheat the Oven: Set your oven to 350°F (175°C) and lightly grease a large baking dish or casserole dish.
2. Prepare the Meat Mixture: In a large bowl, combine ground beef, ground pork, breadcrumbs, diced onion, minced garlic, 1/2 cup shredded cheddar cheese, milk, eggs, Worcestershire sauce, salt, and black pepper.
3. Mix Well: Using your hands or a wooden spoon, mix all the ingredients together until fully combined.
4. Add Vegetables: Gently fold in the mixed vegetables into the meat mixture. This adds color and nutrients to the casserole.
5. Transfer to Baking Dish: Spoon the meat mixture into your prepared baking dish, pressing it down gently to form an even layer.
6. Spread Ketchup: Spread the ketchup evenly over the top of the meat mixture.
7. Bake: Place the casserole in the preheated oven and bake for 30 minutes.
8. Cheesy Topping: After 30 minutes, remove the casserole and sprinkle the remaining 1/2 cup of shredded cheddar cheese on top.
9. Continue Baking: Return the casserole to the oven and bake for an additional 15 minutes or until the cheese is melted and bubbly.
10. Cool and Garnish: Once done, remove from the oven and let it cool for a few minutes. Garnish with chopped green onions before serving.

These straightforward steps guide you in creating a delicious Cheesy Loaded Meatloaf Casserole that delights the palate.