A cozy weeknight casserole with tender egg noodles, savory ground beef, a creamy tomato-sour cream sauce, and a melty cheddar-mozzarella topping. Family-friendly and ready in under an hour.
Preheat oven to 350°F. Lightly grease a 9x13 inch baking dish with butter.
Bring a large pot of salted water to a boil. Cook egg noodles until just shy of al dente. Drain and set aside.
Heat olive oil in a large skillet over medium-high heat. Add ground beef and diced onion; cook until beef is browned and onion is soft. Drain excess fat if needed.
Stir in garlic and cook 0.5 minute until fragrant.
Pour in tomato sauce, beef broth, Worcestershire, salt, black pepper, and red pepper flakes. Simmer 5 to 7 minutes to slightly thicken. Adjust seasoning to taste.
Remove from heat and stir in sour cream until the sauce is smooth.
Add cooked noodles to the skillet and toss to coat evenly with the sauce.
Transfer mixture to the prepared baking dish. Top evenly with cheddar and mozzarella.
Bake 18 to 20 minutes until bubbly. Broil 1 to 2 minutes for golden spots if desired. Rest 5 minutes, garnish with parsley, and serve.
Notes
Make ahead: Assemble up to 24 hours in advance, cover, and refrigerate; add 5 minutes to the bake time. For a lighter version, use 0.5 lb beef and add 0.5 lb mushrooms. Freeze: Wrap tightly and freeze up to 2 months; thaw overnight before baking.