Zesty Lemon Custard Pie

• 4 eggs
• 1 stick butter at room temperature (unsalted)
• 1 egg
• 1 filling
• 1 lemon
• 1 powdered sugar for (garnish)
• 1/2 stick butter (unsalted)
• 250 gr sugar
• 190 gr flour
• 160 ml lemon juice (fresh)