Mixed Berry Galette - Traeger Grills

Ingredients

• 1 Tablespoon distilled white vinegar
• 1/3 Cup ice water
• 1 1/4 Cup all-purpose flour
• 1/2 Teaspoon kosher salt
• 1 Tablespoon granulated sugar
• 1/2 Cup cold unsalted butter, cut into 1 tbsp pieces
• 1 Cup mixed berries (raspberries, blueberries, blackberries)
• 1/4 Cup granulated sugar
• 1/4 Teaspoon kosher salt
• 1 Tablespoon cornstarch
• 1 Whole zest of 1 lemon
• 1 Whole egg
• 1/4 Cup turbinado sugar