Preheat oven to 375°F. Line a baking sheet with parchment paper or aluminum foil.
In a medium mixing bowl, combine sliced peaches, brown sugar, salt, cinnamon, and lemon juice.
Unfold phyllo sheets onto a clean work surface or cutting board. Layer using pastry brush and melted margarine. You don't need a lot, just enough to make the sheets stick together (like glue).
Cut phyllo sheet stack in to a long rectangle.
Add peach mixture to corner of rectangle in a triangular shape.
Fold triangle twice to encase the peach mixture and give you lots of layers of phyllo dough.
Cut triangles and continue to make turnovers.
Place on baking sheet.
Brush tops with margarine and sprinkle with cinnamon and sugar.
Bake for 10 to 15 minutes or until golden brown.