Mixed Berry Galette | America's Heartland

Ingredients

• about 8 medium-sized strawberries, quartered
• 6 oz blackberries
• 6 oz aspberries
• 2 tbsp cornstarch
• ⅓ cup sugar
• 1 tbsp lemon juice
• store-bought or homemade pie dough
• 1 egg
• coarse sugar for sprinkling
• ¾ cup heavy cream
• 2 tbsp granulated sugar
• 1 tsp vanilla extract
• pinch of salt
• ½ cup mascarpone cheese