Prepare muffin tin or extra-large muffin tin by lining cups with parchment cut or torn into 6" by 6" squares. Or use muffin liners. (See favorite liners in Recipe notes below.) Preheat oven to 325 degrees Fahrenheit.
In a medium size mixing bowl combine the following dry ingredients: cassava flour, flax seed meal, cinnamon, ginger, baking soda and sea salt.
Place the following wet ingredients in a high-powered blender: eggs, winter squash, oil, maple syrup, and vanilla. Puree until thoroughly mixed, about 15 seconds.
Pour wet pureée into dry ingredients and fold together completely without over-mixing.
Fill prepared muffin cups with batter. Bake extra-large muffins for about 25 minutes. Bake medium/"normal" size muffins about 15 minutes. Muffins are done when toothpick or sharp knife inserted into center comes out clean.