Preheat your oven to 350°F (175°C).
Cook the egg noodles according to package instructions, then drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the chopped onion and garlic, and sauté until the onion is translucent.
Add the ground beef to the skillet, cooking until browned and fully cooked. Drain any excess fat.
Stir in the cream of mushroom soup and sour cream, mixing until well combined. Season with salt and pepper to taste.
Add the cooked noodles to the beef mixture, stirring gently to combine.
Transfer the mixture to a greased 9×13-inch baking dish. Sprinkle the shredded cheddar cheese evenly over the top.
Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
Remove from the oven and let it cool slightly before serving. Garnish with dried parsley if desired.

Variations & Tips
For a healthier twist, you can use ground turkey or chicken instead of beef. If you have picky eaters, consider adding some hidden veggies like finely chopped carrots or spinach to the beef mixture. For a bit of spice, add a pinch of red pepper flakes or a dash of hot sauce. You can also swap the cream of mushroom soup for cream of chicken or celery soup for a different flavor profile.