Duck Hash on Toasted Baguette

Name: Duck Hash on Toasted Baguette
Ingredients: 1 baguette, sliced on an angle about 1/3 inch thick (30 pieces); 3 tablespoons extra-virgin olive oil, plus more as needed; 1 1/2 teaspoons kosher salt, plus more for seasoning; 1 medium sweet potato, about 8 ounces; 2 legs duck confit, about 1 pound total, room temperature; 3 cloves garlic, 2 peeled and smashed, 1 minced; 1 sprig rosemary; 1/2 small onion, finely diced; 1 rib celery, finely diced; 1/2 red bell pepper, finely diced; 1/4 cup chicken broth, homemade or low-sodium canned, plus more as needed; 2 tablespoons hoisin sauce; Hot sauce, optional; Freshly ground black pepper; 4 sprigs fresh flat-leaf parsley, leaves chopped; Splash of sherry vinegar