pumpkin cranberry muffins

2 Cup flour 1/2 Cup sugar 1 Tablespoon baking soda 1/2 teaspoon salt 1/2 teaspoon cinnamon 1/4 teaspoon nutmeg 15 oz. pumpkin puree 1/2 Cup cranberry (fresh or frozen, sliced in half) 1/2 Cup walnuts (optional)

Sift together flour, sugar, baking soda and salt. Add cinnamon and nutmeg. Add oil and pumpkin puree. Fold in cranberry and walnuts