Mediterranean Baked Mac and Cheese

Name: Mediterranean Baked Mac and Cheese
Ingredients: 1 cup water; 4 Italian sausage; 1 tablespoon olive oil; 6 cups whole-wheat penne pasta; 1 tablespoon butter; 1 tablespoon good-quality olive oil; 2 ½ tablespoons All purpose flour; 1 cup milk; 1 cup heavy cream; 2 tablespoons fresh, chopped Basil; 1 tablespoon fresh rosemary (finely chopped; divided); 2 tablespoons fresh parsley (finely chopped; divided); 3 fresh scallions (cleaned; finely chopped; divided); ¼ cup sun-dried tomatoes (thinly sliced); 1 cup Asiago cheese (grated; divided); salt (to taste); freshly ground Black pepper (to taste)