Blueberry Sour Cream Tart

INGREDIENTS

Crust:

1 1/4 cups

all-purpose flour

1/2 tsp

ground nutmeg

1/8 tsp

salt

1/2 cup

unsalted butter, softened*

1/4 cup

sugar

egg, separated

(*if using salted butter, skip the 1/8 tsp. salt when making the crust)

Filling:

6 tbsp

unsalted butter, softened

1/2 cup

sugar

1 tbsp

all-purpose flour

eggs

3/4 cup

sour cream or plain yogurt

1 1/2 tsp

vanilla extract

1/2 tsp

orange zest (I think lemon would be nice too)

Topping:

2 cups

fresh blueberries (washed and dried)

(optional) 1/4 c. red currant jelly, warmed