Pear Salad with Bacon and Sherry Vinaigrette

Name: Pear Salad with Bacon and Sherry Vinaigrette
Ingredients: 3 pears, such as Bartlett or Comice, halved and cored; 1 tablespoon unsalted butter, melted; 1 teaspoon sugar; 1 teaspoon finely chopped fresh rosemary; Coarse salt and freshly ground pepper; 1 small shallot, finely chopped; 3/4 pound thick-sliced bacon, cooked until crisp and roughly chopped (reserving bacon fat); 1/4 cup sherry vinegar; 1/2 cup extra-virgin olive oil; 1 Asian pear; 2 Belgian endives, 1 separated and 1 sliced crosswise 1/4-inch thick; 1 bunch watercress, tough stems removed; 1 head frisee, torn into bite-size pieces; Aged manchego cheese, shaved, for serving