1. Make Spaghetti

   Preheat oven to 350°F. Lightly coat a 3-qt. baking dish with cooking spray; set aside. Prepare pasta according to package directions. Drain and return to pot. Add 1 jar spaghetti sauce and stir to combine; set aside.

2. Brown Ground Beef

   In an extra-large skillet cook sausage, ground beef, and onion over medium until meat is no longer pink and onion is tender, stirring occasionally. Drain fat.

3. Make Sauce

   Stir in garlic and 1 tsp. of the Italian seasoning; cook 1 minute more. Remove from heat and stir in remaining 1 jar spaghetti sauce.

4. Make Cheese Mixture

   In a medium bowl combine cream cheese, cottage cheese, sour cream, 1 cup shredded mozzarella, and remaining 1 tsp. Italian seasoning; set aside.

5. Assemble

   Add half of the spaghetti mixture to the prepared dish and top with the cottage cheese mixture.

6. Layer on Sauce

   Top with the remaining spaghetti mixture. Spoon meat sauce mixture over the top and spread to an even layer.

7. Add Cheese

   Top with remaining 2 cups shredded mozzarella cheese.

8. Bake and Serve

   Bake until heated through and cheese is bubbly and beginning to brown, about 40 minutes. Let stand 10 minutes before serving. Serve topped with chopped fresh parsley and grated Parmesan cheese.

Million Dollar Spaghetti Recipe Variations

To change up this pasta casserole, consider these variations:

• Pasta: While we love this dish with spaghetti, there's no rule about what pasta shape to use. If you have a different type on hand that your family loves, feel free to sub it in.
• Protein: Swap the ground beef or sausage with ground turkey or other ground meats as desired. You can also skip the meat, if needed, and opt to bulk up the dish with veggies instead.
• Veggies: Give the casserole a nutrient-rich boost with sautéed mushrooms, bell peppers, spinach, kale, broccoli florets, or other favorite vegetables.
• Cottage cheese: While cottage cheese is an easy item to grab from the fridge, you can also use ricotta in its place.
• Herbs: Complement the Italian seasoning with fresh basil.
• Heat: Add a touch of heat with red pepper flakes, or choose a spicy sausage variety.

Can I Freeze Million Dollar Spaghetti?

Whether baked or unbaked, this casserole can be frozen in advance, or as a way to store leftovers. To freeze the unbaked dish, assemble as directed through Step 7. Wrap tightly and freeze for up to two months. Thaw in the refrigerator overnight, then let stand at room temperature while the oven preheats, and bake as directed.

You can also freeze the baked lasagna, whether whole or in slices. for up to two months. Thaw in the refrigerator overnight, bring to room temperature, and reheat, covered with foil, in a preheated 350°F oven until hot throughout. You can also heat small portions in the microwave.

How To Store and Reheat Leftover Million Dollar Spaghetti

To store leftovers of this casserole, wrap and refrigerate for up to four days, or freeze for up to two months, ideally wrapped in individual portions for quick thawing.

Thaw overnight in the refrigerator if frozen. Heat, covered with foil, in a preheated 350°F oven until hot throughout. You can also reheat small portions in the microwave or on the stovetop.