Cook the Spaghetti:

• Preheat the oven to 350°F (175°C).

• Cook the spaghetti according to package instructions. Drain and set aside.

Prepare the Cream Cheese Sauce:

• In a medium saucepan, combine the cream cheese, heavy cream, tomato sauce, diced tomatoes, garlic powder, onion powder, Italian seasoning, and crushed red pepper flakes (if using).

• Heat over medium heat, stirring occasionally, until the cream cheese is fully melted and the sauce is smooth and creamy.

• Season with salt and pepper to taste.

• If using ground beef or sausage, brown it in a separate skillet and add it to the sauce mixture.

Assemble the Casserole:

• In a large mixing bowl, toss the cooked spaghetti with the cream cheese sauce until well coated.

• Transfer the spaghetti mixture into a greased 9×13-inch baking dish.

• Sprinkle the shredded mozzarella cheese and grated Parmesan cheese evenly over the top.

Bake:

• Place the casserole in the preheated oven and bake for 20-25 minutes, or until the top is golden and the cheese is melted and bubbly.

• If you want a more browned top, broil for an additional 2-3 minutes at the end of baking.

Serve:

• Remove the casserole from the oven and let it sit for 5-10 minutes before serving.

• Garnish with fresh basil or parsley, if desired.

• Serve hot and enjoy the creamy, cheesy goodness!