Smoked Salmon Crisps

Name: Smoked Salmon Crisps
Ingredients: 4 1/2 tablespoons all-purpose flour; 2 teaspoons sugar; 1/2 teaspoon kosher salt; 1 chilled large egg white; 4 tablespoons unsalted butter, at room temperature; 1 tablespoon black sesame seeds; 4 ounces sliced smoked salmon, finely chopped; 1 1/2 teaspoons very finely chopped shallot; 1 1/2 teaspoons very finely chopped chives, plus a few snipped, for garnish; 1/4 teaspoon finely grated lemon zest; Freshly ground white pepper; 1/2 cup crème fraîche