Greatberry® Pie

Ingredients

• 330 g flour
• 120 g sugar
• 1/4 teaspoon salt
• 175 g cold butter
• 1 egg yolk
• 1 tablespoon milk
• 2 discs of frozen homemade pie pastry
• 5 cups of Saskatoon berries (I used frozen wild ones I seeked)
• 1/2 cup white sugar, plus 1 tablespoon
• 3 tablespoons of flour
• zest of one lemon
• 2 to 3 tablespoons of butter
• one egg
• sugar for crust