Spaghetti with Chicken Livers and Asparagus

Name: Spaghetti with Chicken Livers and Asparagus
Ingredients: 1 pound spaghetti, prefereable whole wheat (Misurca brand is terrific); 1 pound chicken or duck livers, cleaned and sliced into chunks if large; 1 pound asparagus, trimmed; 16 sage leaves; 1/2 cup good quality (but not best) extra virgin olive oil; 4 tablespoons butter; White pepper to taste; Salt to taste; Splash dry white wine or vermouth; 1 cup pasta water, reserved; 1 leek, cleaned, halved lengthwise and cut into half moons; Shaved parmagiana chees for garnish