Place the unbaked pie crust into a 9-inch pie plate, pressing it gently into the bottom and sides.
Follow package directions to blind-bake the pie crust and allow it to cool.
In a mixing bowl, combine the sugar, cinnamon, ginger, nutmeg, cloves, and salt.
Separately, in a large bowl, lightly beat the eggs until smooth.
Mix the pumpkin purée and the sugar-spice mixture into the beaten eggs.
Gradually stir in the half-and-half until the mixture is well blended.
Transfer the pumpkin filling to the prepared pie crust.
Bake at 350°F for 50-60 minutes, or until a knife inserted near the center comes out clean.
Allow the pie to cool on a wire rack for at least 2 hours before serving. Serve with whipped cream if desired.