Spinach and Artichoke Mac and Cheese

Name: Spinach and Artichoke Mac and Cheese
Ingredients: 1 lb penne or 1 lb whole wheat penne; 2 tablespoons extra virgin olive oil; 3 tablespoons butter; 1 large onion, finely chopped; 3 garlic cloves, finely chopped; 3 tablespoons flour; 1⁄2 cup white wine; 2 cups milk; 1 few grates fresh nutmeg; 1 (10 ounce) box frozen chopped spinach, defrosted and wrung dry in a kitchen towel; 1 (10 ounce) boxfrozen chopped artichokes, defrosted and wrung dry in a kitchen towel; ground black pepper; 1 1⁄4 cups shredded italian Fontina cheese, plus additional for sprinkling on top; 1 1⁄4 cups grated parmigiano-reggiano cheese, plus additional for sprinkling on top