Instructions:

1. Using a hand blender or immersion blender, blend the butter, olive oil, and minced garlic until smooth.

2. Bring water to a boil, add salt, and cook the pasta according to package instructions.

3. Grease a 9 x 12 pan with butter.

4. Dice the green pepper and onion, and slice the mushrooms.

5. Heat the garlic oil in a skillet and sauté the peppers, onions, and mushrooms over medium heat for 3-4 minutes.

6. Drain the cooked pasta and set aside.

7. Add the ground beef to the skillet with the sautéed vegetables. Season with salt and pepper, and cook until the beef is no longer pink. Drain off excess fat.

8. Add the jar of pasta sauce to the skillet with the cooked beef mixture and heat through.

9. In a medium mixing bowl, combine the softened cream cheese, sour cream, and cottage cheese. Use a hand mixer to blend until well mixed.

10. Preheat the oven to 350°F (175°C).

11. Layer half of the cooked pasta in the prepared baking dish. Spread the cheese mixture evenly over the pasta.

12. Top with the remaining pasta, followed by the meat sauce.

13. Cover the dish with foil and bake for 20 minutes.

14. Remove the foil and sprinkle grated cheese on top.

15. Return the dish to the oven and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.

16. Let the casserole rest for 5 minutes before serving.

Enjoy your delicious spaghetti casserole!