In a large skillet over medium heat, add the 1 pound of lean ground beef. Use a wooden spoon to break it apart as it cooks. Cook until the beef is browned and no longer pink, about 5-7 minutes. Drain any excess fat if necessary.
Once the beef is cooked, add the 1/2 chopped onion to the skillet. Sauté for about 3-4 minutes until the onions become translucent and fragrant.
Stir in the 2 heaping tablespoons of tomato paste, 1/2 teaspoon garlic powder, and 1/2 teaspoon chili powder. Mix well to combine and let the mixture cook for an additional 2 minutes to deepen the flavors.
Next, add the 3 cups of beef broth to the skillet. Bring the mixture to a boil, then reduce the heat to a simmer.
Once simmering, stir in the 1 cup of uncooked elbow macaroni. Cover the skillet and let it cook for about 8-10 minutes, or until the pasta is tender and has absorbed most of the liquid.
Remove the skillet from heat and gently stir in the 2 cups of freshly grated cheddar cheese until melted and creamy. Season with salt and pepper to taste.
Scoop the Homemade Hamburger Helper into bowls and serve hot. Enjoy the comforting flavors with your loved ones!