Valley Grape Pie

Yield:	1 Pie
Categories:	Pies, Fruits

1 1/2	c	Graham cracker crumbs
3	tb	Sugar
1/3	c	Butter, melted
3	ts	Cornstarch
2/3	c	Sugar
1/4	c	Water, cold
2	lb	Grapes, seedless (green), with stems removed
1	tb	Lemon juice
1	c	Sour cream
1	tb	Sugar
1	ts	Vanilla extract