Jelly and Custard Doughnuts

Ingredients (23)

• FOR THE DOUGHNUTS:
• 3 tsp active dry yeast
• 1½ cups whole milk
• 1 cup sugar
• 4 tbsp unsalted butter
• 1 tbsp vanilla extract
• 1 tbsp Kosher salt
• 1 whole egg
• 3 egg yolks
• 4¾ cups flour
• vegetable oil
• FOR THE STRAWBERRY JELLY FILLING:
• 2 lbs strawberries
• 3½ cups sugar
• ¼ cup lemon juice
• FOR THE VANILLA CUSTARD:
• 2 cups whole milk
• ½ cup granulated sugar
• 1 egg
• 2 eggs yolks
• ¼ cup corn starch
• 2 tbsp unsalted butter
• 1 tsp vanilla extract