Blackberry Shortcakes with Lemon Curd

Ingredients

• 4 egg yolks at room temperature
• Zest of 3 lemons
• 1/3 c. fresh lemon juice
• 1/2 c. sugar
• pinch of salt
• 3 tbsp. unsalted butter softened
• 18 oz. fresh blackberries
• 3 tbsp. sugar
• 2 c. flour
• 5 tbsp. sugar
• 1 tbsp. baking powder
• 1/2 tsp. salt
• 1/2 c. unsalted butter cold
• 2/3 c. half-and-half
• 1 large egg
• 2 tbsp. sugar
• 1 – 8 oz. container whipped topping thawed