Raspberry-Hazelnut Galette

INGREDIENTS

• 3/4 raw hazelnuts, skin on
• 3/4 kosher salt
• 1 1/4 all-purpose flour plus more for work surface
• 1/2 (1 stick) chilled unsalted butter, cut into 1/2-inch pieces
• 1/4 sugar
• 2 large egg yolks
• 1 raspberry jam
• 1 finely grated lime zest
• 1 fresh lime juice
• 1 large egg, beaten to blend
• 2 raw sugar
• Hazelnut or vanilla ice cream (for serving; optional)