1/2 c  -Cold water
1/4 c  Flour;all purpose
1 c  Maple syrup;pure
1    Egg;lightly beaten
2 tb Butter
1    Pie shell;8 " baked

Whisk water with flour until smooth; stir into syrup in small heavy
saucepan. Stir in egg; cook over medium ~low heat, stirring, until thick,
about 7 minutes. Stir in butter until melted. Pour into pie shell. Let
cool.