Start preheating the oven to 375°F. Then, spray a standard muffin pan with non-stick baking spray in each section, set aside.
In a large bowl, stir together the flour, oats, baking powder, salt and brown sugar. Then, cut in the shortening with a pastry cutter.
Next, add in small pieces of cold butter while continuing to mix with the pastry cutter. I used my Kitchen Aid mixer and just tossed all the ingredients in and used the whisk attachment to combine.
In a separate small bowl, combine and stir together the egg, vinegar and the ice water. Pour this mixture to the flour mixture and mix well.
Roll out the dough on a floured surface until it is about 1/4-1/2" thick. Cut out 2-3" round diameter circles of dough. I used the largest circle Ateco Cutters I had to cut out the mini tart crusts, they worked out perfectly for pressing into the muffin pan.
Transfer each circle cut out into the muffin tin, lightly press the dough inside and around the sides too. Then, prick the bottom of the dough with a fork 3 times to help with shrinking.
Bake for 15 minutes, or until light golden brown. Let the crusts cool after baking before adding the filling.
After they crusts are done, spoon pudding into each cup and top with the fresh fruit. Optional: microwave 1 TBSP any type of jam, then brush on top of the fruit. Drizzle with melted chocolate, if desired. Enjoy!