Step 4: Add the Liquids and Pasta

Pour in the beef broth, tomato sauce, and diced tomatoes (if using). Stir to combine.

Now add the uncooked pasta shells directly into the pot.

Do not pre-boil them—they will cook perfectly in this flavorful tomato broth.

Bring the mixture to a gentle boil.

Step 5: Simmer Until Pasta is Tender

Reduce the heat to medium-low. Cover the pot and let the mixture simmer for about 12–15 minutes.

Stir occasionally so the shells don’t stick to the bottom.

Cook until the pasta is fully tender and most of the liquid has been absorbed.

Step 6: Make It Creamy

Once the pasta is cooked, pour in the heavy cream (or half-and-half).
Stir well—the sauce will start to turn creamy and luscious.

Let it simmer uncovered for 2–3 minutes to thicken slightly.

Step 7: Add the Cheese

Turn off the heat and add:

• Shredded cheddar
• Mozzarella (optional)

Stir until the cheese melts into the sauce, creating a velvety, cheesy coating around every pasta shell.

If you want it extra cheesy, sprinkle more cheese on top and cover for 2 minutes to melt.

Serving Suggestions

• Garnish with fresh parsley or chopped green onions.
• Serve with garlic bread or a simple salad.
• Add crushed red pepper flakes for a spicy kick.

This dish reheats beautifully, making it ideal for next-day lunches.

Tips & Variations

Make it spicy:

Add ½ teaspoon chili powder or a splash of hot sauce.

Make it healthier:

Use whole-grain shells and leaner beef, or replace half the beef with mushrooms.

Extra creamy version:

Stir in ¼ cup cream cheese at the end.

Mexican twist:

Swap Italian seasoning for taco seasoning and use Monterey Jack cheese.

Final Thoughts

One-Pot Cheesy Beef and Shells is a perfect combination of simplicity and comfort. With minimal prep, no complicated steps, and only one pot to wash, it’s the kind of recipe you’ll come back to again and again. Rich, cheesy, flavorful, and guaranteed to satisfy—this dish is everything a cozy weeknight dinner should be.

If you’d like, I can also create a printable recipe card or a shorter quick-version recipe!