Preheat oven to 325 degrees. In a medium bowl, whisk together dry ingredients: flour, baking soda, salt, cinnamon and nutmeg. Add oats and stir to combine. In a large mixing bowl, using an electric mixer, beat butter and csugar until well mixed. Add vanilla and eggs and mix until well blended . Add dry ingredients mixture a little at a time just until combined. Stir in cranberries and walnuts and optional white chocolate chips. Roll dough into small balls or use Cookie scoop and place onto a parchment lined cookie sheet , silicone lined pan, or spray non stick spray on a cookie sheet and place about 2″ apart. Press cookies down slightly to flattten. Bake cookies 7 minutes, rotate pan and bake an additional 7 minutes, or just until set. Remove cookies from oven, even if cookies are slightly soft in center. They will continue to bake after being removed from the oven, while cooling on the pan. (and thus not over browning the bottoms and edges.allow to cool approximately 2-5 minutes before transferring to a cooling rack. Store in airtight containers.