1-First, heat a large deep skillet over medium heat and add the olive oil, diced yellow onion, and ground beef. Sauté until the beef is browned and the onions turn translucent, which should take around 5-7 minutes. Don’t forget to drain any excess fat if needed to keep things light and flavorful.

2-Next, stir in the all-purpose flour and cook for about one minute, making sure it doesn’t burn this helps thicken the sauce nicely. Then, pour in the tomato sauce and beef broth, stirring well to dissolve the flour and create a smooth base.

3-Now, add the uncooked pasta shells and mix everything together. Cover the skillet and bring it to a boil over medium-high heat, stirring occasionally to avoid sticking. Once it’s boiling, lower the heat to a simmer and let it cook for about 10 minutes until the pasta is tender and the sauce has thickened up.

4-Finally, remove from the heat and stir in the shredded cheddar cheese until it’s fully melted and creamy. Fold in the hot dog relish for that extra zing, and garnish with sliced green onions if you want a fresh touch. Serve it hot, and enjoy the smiles around your table!