Bring the mixture to a simmer and let it cook for 2-3 minutes. This allows the flavors to meld together.
Stir in the cooked pasta and milk, ensuring everything is evenly coated and mixed. The pasta will begin to absorb the liquid and flavors from the sauce.
Step 3: Assemble the Casserole
Grease a 9×13-inch baking dish with non-stick spray or butter.
Pour the beef and pasta mixture into the prepared baking dish. Spread it out evenly.
Top the casserole with shredded cheddar cheese. Make sure the cheese covers the entire surface, as it will melt and form a delicious golden crust.
Step 4: Bake
Place the baking dish in the preheated oven and bake uncovered for 20-25 minutes. You’ll know it’s done when the cheese is melted and bubbly, and the edges are slightly golden brown.
If you prefer a crispy cheese top, you can broil it for 1–2 minutes at the end of baking, but be careful not to burn it.