Preheat oven to 350°F In a medium sized bowl, sift together the flour, salt, sugar, and baking soda.
Mix the pumpkin, melted butter, eggs, 1/4 cup of water, and spices together, then combine with the dry ingredients, until just incorporated. Do not over-mix. Fold in the candied ginger and chopped nuts.
Spoon mixture into a prepared muffin tin. Bake for 25-30 minutes. Check for doneness with a toothpick inserted into the center of a muffin. If it comes out clean, it's done. Cool on a rack.