Here’s what you do:

Preheat oven to 350°F.

1. Make the crust: In a food processor grind gingersnaps, almonds, coconut and sugar fine and add butter, blending until combined well. Press mixture onto bottom and up side of a 9-inch (1-quart) glass pie plate. Bake crust in middle of oven 15 minutes, or until crisp and golden around edge, and cool on rack.

2. Make filling: In a small bowl sprinkle gelatin over brandy, rum, or water and let stand. In a heavy saucepan whisk together milk, brown sugar, yolks, pumpkin, spices, and salt and cook over moderately low heat, whisking, until mixture registers 160°F. on a candy thermometer. Remove pan from heat and immediately add gelatin mixture, whisking until gelatin is completely dissolved.

3. Transfer filling to a metal bowl set in a larger bowl of ice and cold water and cool, stirring constantly, just until the consistency of raw egg white. Remove bowl from ice water.

4. In a bowl with an electric mixer beat cream until it holds stiff peaks and whisk about one fourth into filling to lighten.

5. Fold in remaining cream gently but thoroughly and pour filling into crust. Chill pie until set, at least 3 hours and up to 24, covered with plastic wrap after 1 hour.

6. Top each serving with whipped cream and garnish with chopped crystallized ginger.