Step 5: Add Final Cheese and Rest
Once the pasta is fully cooked through, carefully remove the foil. Sprinkle the reserved half cup of shredded cheddar evenly over the top. Return the dish to the oven, uncovered, for 8 to 10 minutes until the cheese is fully melted, lightly golden, and beginning to bubble at the edges. Remove from the oven and allow the casserole to rest for 10 minutes before serving. This resting time is important — the sauce thickens slightly as it cools, making the casserole easier to scoop in neat, cohesive portions rather than running onto the plate.
Serving Suggestions and Variations
Serve directly from the baking dish with a simple green salad alongside — crisp romaine or mixed greens with a tangy vinaigrette balances the richness of the cheesy pasta well. Crusty bread or garlic bread for mopping the tomato sauce from the dish is not optional, practically speaking. This casserole is substantial enough to serve as a complete meal for four to six people.
For a crowd, increase the pasta to 3 cups and the tomato sauce to 4 cups, adding an extra half cup of water to ensure the noodles cook through; use a deeper baking dish and add 10 to 15 minutes to the covered baking time. For a creamier result, swap half a cup of the tomato sauce for half a cup of heavy cream, which gives the finished sauce a softer, richer character. A layer of finely diced onion and bell pepper sautéed briefly with the beef before draining adds flavor and texture without complicating the method. A pinch of crushed red pepper flakes in the tomato mixture adds gentle heat that works particularly well with the sharpness of aged cheddar. For half the ground beef, substitute ground Italian sausage — spicy or mild — for a more pronounced herbal, savory depth throughout.
Storage
Leftovers keep well in an airtight container in the refrigerator for up to three days. Reheat individual portions in the microwave covered with a damp paper towel, or reheat larger amounts covered with foil in a 325°F oven with a splash of water or extra tomato sauce stirred in to prevent the pasta from drying out. The casserole can be assembled completely up to 24 hours in advance, covered, and refrigerated before baking — add 10 to 15 minutes to the covered baking time when starting from cold.
