Rich and Comforting Creamy Beef Shells Casserole

Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil. Cook the pasta shells according to package instructions until al dente. Drain and set aside.

Step 2: Cook the Beef Mixture

1. Heat olive oil in a large skillet over medium heat.
2. Add the ground beef and cook until browned, breaking it into small crumbles.
3. Stir in the diced onion and cook for 3–4 minutes until softened.
4. Add the minced garlic, Italian seasoning, smoked paprika, red pepper flakes (if using), and season with salt and pepper. Cook for 1 minute until fragrant. Remove from heat and set aside.

Step 3: Make the Creamy Sauce

1. In a medium saucepan, melt butter over medium heat. Whisk in the flour and cook for 1–2 minutes to form a roux.
2. Gradually whisk in the milk and beef broth, stirring constantly to avoid lumps.
3. Cook for 3–5 minutes until the mixture thickens.
4. Remove from heat and stir in the cheddar, Parmesan, and mozzarella cheeses until smooth and creamy.

Step 4: Combine and Assemble

1. Preheat your oven to 375°F (190°C).
2. In a large mixing bowl, combine the cooked pasta, beef mixture, and cheese sauce. Stir until well combined.
3. Transfer the mixture to a greased 9×13-inch baking dish. Smooth the top with a spatula.

Step 5: Add Toppings and Bake

1. Sprinkle crushed crackers or breadcrumbs over the casserole for a crispy topping, if desired.
2. Bake uncovered for 20–25 minutes, or until the casserole is bubbly and golden on top.

Serving Suggestions

• Garnish with fresh parsley for a pop of color and freshness.
• Pair with a simple green salad or steamed vegetables for a balanced meal.

Storage and Reheating

• Refrigerate: Store leftovers in an airtight container for up to 3 days.
• Reheat: Warm individual portions in the microwave or reheat the entire casserole in the oven at 350°F (175°C) for 15–20 minutes.

Tips for Success

• Ground Meat Options: Swap ground beef for ground turkey or chicken for a lighter version.
• Cheese Choices: Use a blend of your favorite cheeses, such as Gouda or Monterey Jack, for a unique flavor.
• Make It Ahead: Assemble the casserole ahead of time, cover it tightly, and refrigerate. When ready to bake, add 5–10 minutes to the cooking time.

This Rich and Comforting Creamy Beef Shells Casserole is a hearty dish that combines classic flavors with an indulgent twist. It’s perfect for feeding a hungry family or impressing guests at a potluck!