Pre-heat oven to 350F (180C), grease and flour an 8 or 9 inch- (20 - 22 cm) pie dish.
In a large bowl*,gently whisk together flour, sugar and baking powder, create a well in the middle and add slightly beaten egg and yolk and softened butter cut into pieces. Mix together, at this point turn mixture onto a slightly floured surface and work the mixture to form a soft dough (if dough is very dry then add an extra tablespoon of soft butter).
Wrap in plastic and refrigerate for 30 minutes. Remove from fridge and knead the dough a couple of times to soften it up again on a lightly floured surface. Roll out to 1/8" thickness.
Transfer to prepared pie plate, I used a 8" pie dish (20 cm). Trim the dish of any extra dough. Prick the dough with the tongs of a fork, then fill the pastry shell with the jam**. With the extra dough make strips to create a lattice finish. Brush top lightly with milk and bake in pre heated oven at 350° (180°) for 25-30 minutes or until golden. Let cool then slice, enjoy!
**Any type of jam can be used, but I find raspberry, strawberry, blueberry, apricot, peach or a wild fruit mixture work the best.
*I also make the dough using a food processor, whisk the ingredients together in the food processor cup, then add the egg, yolk and butter and pulse until almost combined, moved to a lightly floured surface and knead gently to completely combine. Wrap and refrigerate.With any extra dough, I made squares and I placed 1 teaspoon of jam in the middle, folded it over, pinched the sides closed and baked in the oven for about 20 minutes at 350° (180°)).