Combine the rolled oats, pumpkin puree, milk, cinnamon, nutmeg, cloves, and honey in a mixing bowl, stirring until well integrated and the mixture is smooth.
Transfer the mixture into a jar or container with a lid, then cover and refrigerate overnight or at least 4 hours to allow the oats to soak and absorb the flavors.
Preheat your oven and toast the pumpkin seeds until they are golden and crisp, smelling nutty—this takes about 5-7 minutes.
Once the oats are chilled, stir the mixture to ensure a uniform creamy texture and check the consistency, adding a splash more milk if needed.
Spoon the overnight oats into bowls, then sprinkle generously with toasted pumpkin seeds and a dash of extra cinnamon or nutmeg for aroma and visual appeal.
Enjoy immediately for a creamy, layered treat that evokes cozy fall mornings.