Cook the pasta according to the package directions and drain.
In a large saucepan, melt the butter and fry the sage until darkened and edges look crispy. Remove from pan and let drain to crisp up on a paper towel.
In the same saucepan, add the onion and garlic and sauté until the onion has softened and is beginning to brown.
Stir in all the remaining ingredients and bring to a simmer. Add the pasta to the sauce. Toss well to coat, and serve with the fried sage on top!