Blue Cheese and Red Potato Tart

INGREDIENTS

• Tart Shell:
• 1 1/4 (5 1/2 ounces) cups flour
• 1 tablespoon plus 2 teaspoons cornstarch
• 1/4 teaspoon salt
• 6 tablespoons (3 ounces) butter, diced
• 1 large egg
• Filling:
• 1 pound small red potatoes, scrubbed and cut into 1/4-inch slices
• 1 cup heavy cream
• 1 large egg yolk
• 1/4 pound blue cheese, crumbled (about 3/4 cup)
• 1 tablespoons finely chopped herb or herbs of your choice, such as a mixture of thyme and rosemary
• Fine sea salt for sprinkling