1Form a large ring of flour on your work surface.
2In the center of the ring of flour make a mound of sugar, baking powder and cinnamon; also make a mound of butter cut into small squares.
3With the palm of your hand, cream the butter and add to the sugar mixture while continuing to cream.
4Push the flour into the center and blend with the butter/sugar mixture into a coarse meal.
5Add all the water, press to mix in the water, then work the dough into a ball with the palms to an equal consistency having no dry spots.
6Roll out one 10-inch tart shell on the floured work surface.
7Chill about half an hour.
8Place the shell into a pie pan, or tart pan and mold a piece of aluminum foil in the pan.
9Bake in 350 degree preheated oven for 15 - 20 minutes until golden brown.
10Apricot Glaze: Combine jam, sugar and water in a heavy saucepan.
11Mix well, bring to a boil then simmer until clear.
12Peach Filling: Cut each peach into eight sections and arrange snugly in baked tart shell.
13Lightly brush apricot glaze over all peaches and serve.