An egg yolk makes this tart crust ultra-rich, almost like shortbread. Just as you can fill dessert tarts with almost any fruit imaginable, savory tarts are blank canvases for all sorts of vegetables.

Makes: Enough for a 9-inch tart
Time: 20 minutes, plus time to chill

Ingredients

• 1 1/4 cups flour

• 1/2 teaspoon salt

• 1 stick cold butter, cut into chunks

• 1 egg yolk