Fill a cup with ice and water. Sift the flour and salt in a bowl. Cut in the shortening to make pea-size pieces. Add the tablespoons of ice water from the cup until dough holds together.
Roll the dough between two sheets of waxed paper. Cut the shells using a large glass or your smallest pot. You should have about 12 shells when finished. Put these into a greased muffin or tart pan.
Preheat the oven to 400 degrees F.
Make the filling which is so easy. Simply mix all the ingredients together until evenly distributed.
Spoon it into the tarts shells being careful not to overfill.
Bake for 15 minutes until center is glistening and the pastry is buttery and golden.