Begin preparing the blueberry sauce. Add either fresh or frozen blueberries, five tablespoons of water, lemon juice, lemon zest and granulated sugar to a pot.
Fry the tortillas. Cut the tortillas and add the tortilla circles to the skillet (make sure to not overcrowd the skillet) and fry for 10 seconds (or until golden). Coat the tortillas with the brown sugar.
Pipe. Pipe the filling into the homemade taco shells (see below for details on how to make). Top the tacos with the blueberry sauce. Serve immediately.