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