Million Dollar Spaghetti Casserole

Ingredients:

• 1 lb spaghetti
• 1 lb ground beef
• 1 jar (24 oz) marinara sauce
• 1 package (8 oz) cream cheese, softened
• 1 cup ricotta cheese
• 1 cup sour cream
• 1/2 cup grated Parmesan cheese
• 2 cups shredded mozzarella cheese
• 1/4 cup unsalted butter, sliced
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• Salt and pepper to taste
• Fresh parsley, chopped (for garnish)