Creating Creamy Beef and Shells is straightforward when you follow these easy steps:

1. Cook the Pasta: In a large pot, boil water and add the pasta shells. Cook according to package instructions until al dente. Drain and set aside.
2. Prepare the Beef: In a large skillet, heat a tablespoon of olive oil over medium heat. Add the diced onion and minced garlic, sautéing until fragrant and translucent.
3. Brown the Beef: Add the ground beef to the skillet, breaking it up with a spoon. Season with salt, pepper, and Italian seasoning. Cook until the beef is browned and cooked through, about 5-7 minutes.
4. Combine Ingredients: Pour in the beef broth and heavy cream. Stir well to combine, cooking for 2-3 minutes until the mixture begins to thicken.
5. Add Cheese: Reduce the heat to low, then add the shredded cheddar cheese, stirring until melted and smooth.
6. Mix in Pasta: Gently fold the cooked pasta shells into the creamy beef mixture, ensuring they are well coated in the sauce.
7. Serve: Allow the dish to cook for another 2-3 minutes to heat through fully, then serve immediately.

These steps will guide you in making this amazing dish effortlessly.