Preheat your oven to 350 degrees Fahrenheit. This ensures that your dish will bake evenly and come out perfectly cooked.
Spray a suitable oven-safe baking dish with non-stick spray. This will help prevent the spaghetti from sticking and make cleanup a breeze.
Layer half of the precooked spaghetti noodles into the bottom of the baking dish. If you’re using the amounts stated in this recipe, a 9x13 inch pan works wonderfully.
Spoon half of the spaghetti sauce over the noodles, making sure to cover them evenly. This will infuse the noodles with flavor as they bake.
Add half of the shredded mozzarella on top of the sauce. This layer adds a creamy texture that melts beautifully.
Repeat the layering process with the remaining noodles, sauce, and cheese. This builds up the dish, ensuring every bite is delicious.
Top the final layer with the remaining shredded mozzarella and place the slices of provolone cheese on top. This will give your baked spaghetti a beautiful, cheesy crust.
Carefully place the dish in the preheated oven and bake for 35 to 45 minutes. Keep an eye on it, and look for the cheese to be bubbly and browned on top.
Once it’s heated through, take it out of the oven and let it sit for a few minutes before serving. This resting time helps the layers set and makes serving easier.
