1. Preheat oven and bake pie crust according to package directions. Melt chocolate in microwave or double boiler, and let cool until its warm, not hot.
2. While chocolate is melting, put the tofu into a blender or food processor, and blend until smooth. Add the chocolate and blend again until smooth. Add the vanilla and blend.
3. Pour into pie crust and refigerate for 1 hour, and serve at room temperature.