Sicilys Famous Spaghetti with Eggplant and Ricotta Salata

Name: Sicily’s Famous Spaghetti with Eggplant and Ricotta Salata
Ingredients: Olive oil for deep-frying and the pasta water; 2 medium eggplants, cut into ½-inch cubes; 3 cups Fresh Tomato Sauce (or bottled sauce); Salt; 1 pound spaghetti; 2 tablespoons unsalted butter; ½ cup (about 2 ounces) grated ricotta salata, plus more for passing at the table