These pretty tartlets can be made one day ahead. Arrange them in a single layer in a shallow plastic container for transporting.
Ingredients
2 cups all purpose flour
1/4 cup sugar
Pinch of salt
3/4 cup (1 1/2 sticks) chilled unsalted butter, cut into 1/2-inch pieces
1/4 cup ice water
4 firm but ripe nectarines, halved, pitted, cut into 1/3-inch-thick wedges
4 firm but ripe plums, halved, pitted, cut into 1/3-inch-thick wedges
3 1/2 tablespoons sugar
6 blackberries
1/2 cup plum jelly
Directions
Combine flour, sugar and salt in processor. Add butter; using on/off turns, cut in until mixture resembles coarse meal. Add 1/4 cup ice water and process using on/off turns until moist clumps form. Gather dough together. Divide dough into 6 equal pieces. Flatten into disks. Wrap each in plastic. Chill until firm, at least 1 hour or overnight.
Position rack in center of oven and preheat to 400°F. Roll out each dough disk on floured surface to 5 1/2-inch round. Transfer rounds to 4 1/2-inch-diameter tartlet pans with removable bottoms. Press dough onto bottoms and up sides of pans. Place pans on baking sheet.
Toss nectarines, plums and sugar in large bowl. Arrange fruit in crusts. Bake tartlets 10 minutes. Reduce heat to 350°F and continue baking until fruit is tender and beginning to bubble and crusts are golden, about 40 minutes longer. Transfer tartlets to rack and cool completely. Place berry in center of each.
Stir jelly in heavy small saucepan over low heat until melted. Brush warm jelly over tartlets. (Can be prepared 1 day ahead. Let stand at room temperature.)
