Simmer all ingredients on medium heat for 7-9 minutes, until apples are soft. Putting together the poptarts:
Cut dough into 3x4 inch rectangles, divide in half. Drop a spoonful of apple mixture onto half of the rectangles (I would say 1-1.5 tablespoons). Take a little water on your fingertips, and run around the edges of your bottom crust, then add a top crust and push down to seal it. Go around the edges of each with a fork, pushing down softly. Bake for 15 minutes at 350 degrees.
Mix all glaze ingredients for glaze with a whisk (if it is too thin, add more sugar). Spread over poptarts