Making Sour Cream Beef Noodle Casserole is a breeze. Follow these steps to create this delicious dish:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).

2. Cook the Noodles: In a large pot, bring water to a boil. Add the egg noodles and cook according to package directions until al dente. Drain and set aside.

3. Brown the Beef: In a large skillet over medium heat, add the ground beef. Cook until browned, breaking it apart with a spatula. Drain excess fat.

4. Sauté Onions and Garlic: Add the chopped onion and minced garlic to the skillet with the beef. Cook until the onion is translucent.

5. Combine Ingredients: In a large bowl, mix the cooked noodles, beef mixture, sour cream, cream of mushroom soup, salt, pepper, and paprika. Stir until everything is well combined.

6. Add Vegetables: If using, fold in the frozen mixed vegetables until evenly distributed.

7. Transfer to Casserole Dish: Pour the mixture into a greased 9×13-inch casserole dish. Spread it evenly.

8. Top with Cheese: Sprinkle the shredded cheddar cheese evenly over the top.

9. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until bubbly and the cheese is melted and golden.

10. Cool and Serve: Once done, remove from the oven and let it cool for a few minutes before serving.