Preheat the oven to 375°F.
Add the ground beef and diced onion to a large oven-safe skillet or pot over medium-high heat.
Season with Dan-O’s Original Seasoning, garlic powder, black pepper, and Kinder’s Buttery Garlic & Herb Seasoning. Cook until the beef is browned and the onion is tender. Drain any excess grease if needed.
Pour in the marinara sauce and Alfredo sauce. Stir everything together until well combined.
Add the cooked spaghetti and mix until the noodles are completely coated in the creamy meat sauce.
Reduce the heat to low and let everything simmer for about 20 minutes, stirring occasionally.
Spread the spaghetti evenly in the oven-safe skillet or transfer it to a baking dish.
Top the spaghetti with shredded mozzarella cheese.
Bake at 375°F until the cheese is melted, bubbly, and golden on top.
