Add pork sausage, ground beef, onion, garlic, salt, and pepper to a large pot over medium-high heat on the stove. Cook 15 minutes until the meat crumbles and cooks through.
½ pound pork sausage, ½ pound ground beef, ½ red onion, 2 garlic cloves, ½ teaspoon salt, ½ teaspoon pepper
Pour in chicken stock and spaghetti sauce, then add spaghetti noodles and red pepper flakes to the pot. Raise the heat and bring to a boil, stirring so the spaghetti does not stick together or to the bottom of the pot.
32 ounces chicken stock, 24 ounces spaghetti sauce, 12 ounces spaghetti, 1 teaspoon red pepper flakes
Once boiling, lower the heat to medium and simmer for 15-20 minutes, stirring occasionally to keep the noodles from sticking to the pot.
Remove from heat. Top with parmesan and parsley, serve, and enjoy!
Parsley, optional for topping, Parmesan, optional for topping