Preheat the Oven:

1. Preheat your oven to 375°F (190°C).
2. Grease a 9×13-inch baking dish with nonstick spray or a drizzle of olive oil.

2. Cook the Ground Beef:

1. Heat a skillet over medium heat and cook the ground beef until browned and crumbly, about 5-7 minutes.
2. Drain excess grease and season with salt, pepper, and Creole seasoning.

3. Prepare the Sauce:

1. In a large mixing bowl, combine cream of mushroom soup, cream of chicken soup, broth, milk, sour cream, Worcestershire sauce, and Cajun seasoning (if using).
2. Whisk until smooth and set aside.

4. Assemble the Casserole:

1. Layer the sliced potatoes evenly in the bottom of the prepared baking dish.
2. Sprinkle the diced onion and any optional vegetables (like carrots or bell pepper) over the potatoes.
3. Spread the cooked ground beef over the vegetable layer.
4. Pour the prepared soup mixture evenly over the top, ensuring all layers are coated.

5. Bake the Casserole:

1. Cover the dish tightly with aluminum foil and bake for 45 minutes.
2. Remove the foil and sprinkle shredded cheddar cheese and French’s Fried Onions on top.
3. Return to the oven and bake uncovered for an additional 15-20 minutes, or until the cheese is melted and bubbling.

6. Cool and Serve:

1. Let the casserole rest for 5-10 minutes before serving.
2. Garnish with fresh parsley or additional seasoning if desired.