Pre-heat oven to 350F (180C). Grease and flour a 6 medium size muffin tin.
In a small bowl whisk together the sugar and cinnamon, set aside.
Unroll the puff pastry dough and give it a few gently rolls with a rolling pin to help flatten it out.
Brush the dough with the melted butter and sprinkle with the cinnamon sugar combination.
Then cut the dough into 6 even strips about 2 inches (5 cm) wide. Place about 7-10 peach slices lengthwise in a straight line, halfway down, and overlapping slightly, on each strip of dough (see photos).
Fold up the bottom of the dough over the slices and tightly roll the dough to form a rose shape. Seal the edges with a little water so they stick. Place each Rose tart in the prepared muffin tin and bake for approximately 35 minutes*. Let cool to warm then dust with powdered sugar before serving. Enjoy!
* Depending on your oven, start checking at about 25 minutes, if the tops of the peaches start to brown too much cover them with foil and continue baking.