Ingredients 8 tablespoons (1/2 cup or 1 stick) butter, unsalted 2 medium onions, finely diced 3 cups chopped celery, (about 6 large stalks) 6 cups coarsely chopped leeks (bottom white/light green parts only) 4 apples, peeled, cored and chopped 1 pound breakfast sausage or Italian sausage (casings removed) 2 tablespoons garlic powder 2 tablespoons onion powder 2 teaspoons chopped fresh rosemary leaves, (about 6 sprigs) 2 teaspoons chopped fresh sage leaves, (about 6 leaves) 2 teaspoons chopped fr