Strawberry Cream Puff Cake (Paris Brest)

INGREDIENTS

1 stick

unsalted butter, cut into pieces

1 tsp

sugar

1/2 tsp

salt

1 cup

all purpose flour

large eggs, plus 1 large egg for egg wash

2 cups

heavy cream

3 tbsp

confectioners' sugar, plus more for dusting

1/2 tsp

pure vanilla extract

1 cup

sliced strawberries