Preheat oven to 400 degrees F. Grease or line muffin tins with paper liners, enough for 12 muffins.
In a large bowl stir flour, baking powder, cinnamon, nutmeg and salt together. Set aside.
In a medium bowl lightly beat egg with a whisk. Add sugar, pumpkin, milk and oil. Stir together until well blended.
Stir into flour mixture until well blended. Add in nuts/raisins if desired.
Using a large cookie scoop or a 1/4 C measure, scoop batter into muffin tins dividing evenly among the 12 muffins. If desired, scatter pumpkin seeds over top of each muffin.
Bake for 20-25 minutes.