Portobello Penne with Caramelized Onion and Goat's Cheese

Portobello Penne with Caramelized Onion and Goat's Cheese is an onion lovers dream, calling for three large caramelized onions. I am also a mushroom fanatic, so I like to double batch this recipe, and have extra in the refrigerator for busy weeknights and lunches. If I am feeling extra fancy, I use Ritrovo corn penne pasta and throw in a mixture of wild mushrooms. Portobello Penne is not the most attractive meal in the world, but it tastes pretty good to Brent and I :)

Ingredients:
2 tablespoons butter
2 tablespoons olive oil
3 onions, chopped
1 teaspoon salt
1/2 teaspoon sugar
3 portobello mushrooms, stems removed, caps halved and then cut crosswise into 1/4-inch slices

10 ounces cremini mushrooms, sliced
3 tablespoons chopped fresh parsley
1/4 teaspoon fresh-ground black pepper
3/4 pound penne
3 ounces soft goat cheese, crumbled
3 tablespoons grated Parmesan cheese

Directions:
In a large frying pan, melt 1 tablespoon of the butter with 1 tablespoons of the oil over moderate heat. Add the onions, 1/2 teaspoon of the salt, and the sugar and cook, stirring frequently, until the onions are well browned, about 20 minutes. Remove from the pan.
In the same pan, melt the remaining 1 tablespoon butter with 1 tablespoon of the oil over moderate heat. Add the mushrooms and 1/4 teaspoon of the salt and cook, stirring occasionally, until tender and brown, about 8 minutes. Add the reserved onions, the parsley, the remaining 1/4 teaspoon salt, and the pepper.
In a large pot of boiling, salted water, cook the pasta until just done, about 13 minutes. Reserve 3/4 cup of the pasta water and drain. Toss the pasta and 1/2 cup of the reserved pasta water with the mushroom mixture, the goat cheese, and the Parmesan. If the pasta seems dry, add more of the reserved pasta water. Serve with extra Parmesan.