1. Preheat Oven:
– Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set aside.

2. Cook Ground Beef:
– In a large skillet over medium heat, cook the ground beef until browned and crumbled. Drain excess grease if necessary.
– Add the diced onion and garlic, cooking until softened, about 3–4 minutes.

3. Prepare the Mixture:
– Stir in the cream of celery soup, beef stock, garlic powder, onion powder, Italian seasoning, paprika, salt, and pepper. Mix well.

4. Add Rice and Vegetables:
– Stir in the instant rice and frozen mixed vegetables. Cook for 2–3 minutes until well combined and slightly thickened.

5. Assemble the Casserole:
– Transfer the mixture to the prepared baking dish. Spread it evenly, then sprinkle the shredded cheddar cheese over the top.

6. Bake:
– Cover the dish with aluminum foil and bake for 20 minutes.
– Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.

7. Serve:
– Let the casserole cool for a few minutes before serving. Enjoy!