From food blogger Michele Ugghorn, who says she has made this pie for years.

Place ground cherries into an unbaked pie shell. Stir together the brown sugar and the 1 tablespoon of flour - put this evenly over the ground cherries and then sprinkle water - again evenly over all.

Stir together the 3 tablespoons sugar and the 3 tablespoons flour. Cut in the butter until it is crumbly. Place on top of pie.

Bake in a preheated 425 degree oven for 15 minutes. Then turn down to 375 degrees and bake another 25 to 28 minutes.