Mini Peach Pies

INGREDIENTS

• 1 batch deep-dish piecrust (see related recipe at left)
• 4 tsp. cornstarch
• 4 tsp. fresh lemon juice
• 4 large ripe peaches, each about 6 oz., peeled and cut into 1/2-inch dice
• 6 Tbs. firmly packed light brown sugar
• Pinch of salt
• 1/2 tsp. vanilla extract
• 2 sheets frozen puff pastry, each 9 1/2 inches square, thawed but chilled
• 1 egg, lightly beaten with 1 tsp. water