c("To make tart, place flour, salt and sugar in processor and pulse several  times.", "Cut butter into tiny pieces and pulse until mixture looks like  bread crumbs.", "Add water and bring dough into ball.", "Knead lightly and  place in plastic and chill at least 20 minutes.", "In large bowl whisk sugar  with cornstarch and gentle toss in nectarines (and optional blueberries.", "Sprinkle with lemon juice. Roll out dough on lightly floured board to  about a 12-inch round.", "Fold in half and then half again and place on  ungreased baking sheet. Unfold.", 
"Pour fruit and juice into pastry and mound  in middle. Gently fold up edges around filling leaving 6-inch opening in  middle. Pinch folds together and brush with water sprinkle on 1 Tbsp of sugar.", "Bake in preheated 375°F oven 35-45 minutes until golden.", "Note: You can easily substitute blackberries for blueberries in this  recipe.")