Roti with Black Truffle–Sunchoke Ranch

Name: Roti with Black Truffle–Sunchoke Ranch
Ingredients: 1 cup all-purpose flour, plus more for dusting; 1 cup pastry flour; 1 tsp. granulated sugar; 1⁄2 tsp. baking powder; 2 tsp. kosher salt, plus more to taste; 1⁄2 cup crème fraiche; 1⁄2 cup plain full-fat yogurt; 1 cup olive oil; 1 lb. sunchokes, grated; 2 cups grapeseed oil; 2 oz. red wine vinegar; 1 tbsp. Dijon mustard; 1 black truffle, 1/2 grated, 1/2 thinly sliced for garnish (optional); 1 egg yolk; 1⁄4 cup buttermilk; Freshly ground black pepper, to taste; Hot sauce, preferably Tabasco, to taste; 1⁄2 cup ghee or clarified butter; Grated pecorino cheese, for serving (optional)