In a medium, heat-proof bowl whisk together cornstarch, sugar, cinnamon, nutmeg, cloves, salt, milk, and pumpkin until well blended. Place bowl over (not on) simmering water for approximately 15 to 20 minutes, stirring occasionally. Pudding is ready when mixture coats a spoon. Add vanilla and stir to combine.

Combine vanilla pudding ingredients and cook in the same manner as for pumpkin pudding. Add vanilla and stir to combine.

Chill pudding until ready to use.

Combine granola, cinnamon, and sugar and stir to combine. Set aside.

Fill pastry bags with 1 flavor of pudding each.

In a tall, clear glass or decorative bowl, pipe in a layer of 1 pudding flavor until about 1-inch deep. Sprinkle top of pudding with granola mixture. Pipe in a second layer of the second flavor to the same depth. Sprinkle more granola mixture. Repeat until about 1-inch from the top of the glass. Sprinkle granola on top.

Serve immediately or chill and serve.