Cheeseburger Casserole

Name: Cheeseburger Casserole
Ingredients: 12 ounces (340g) dried elbow macaroni (about 6 cups dry pasta ); 1 1/2 pounds ground beef (I like 80:20); 2 teaspoons oregano; 1 teaspoon sea salt, plus more as needed for salting the pasta water; 1 teaspoon black pepper; 1 teaspoon chili powder; 1 teaspoon ground cumin; 2 teaspoons butter; 1/2 cup chopped yellow onion; 1 tablespoon minced garlic; 1/4 cup tomato puree; 1 1/2 cups heavy cream; 1/4 cup chicken stock; 1/2 teaspoon dried parsley; 1/2 teaspoon dried basil; 2 cups shredded Monterey Jack cheese , divided; 2 cups shredded cheddar cheese , divided