In a coffee grinder or spice grinder, grind 1 tablespoon of chia seeds. In a small bowl whisk together with ¼ cup of water. Allow to sit for 5 minutes. Paste will thicken and become gloppy.
Slice and peel mango. Chop into cubes. Puree one cup of mango cubes in the food processor. Depending on the ripeness of your mango you may end up with a liquid texture, or a finely chopped texture. If you do not have a food processor, finely chop the mango.
Add whole wheat flour, sugar, baking powder, salt, nutmeg, ginger, and cinnamon in a large bowl. Whisk together to combine.
In a medium size bowl combine almond milk, apple cider vinegar, and vanilla. Whisk together to combine.
Pour wet ingredients into dry ingredients. It's okay if the batter is a little lumpy. Add chopped mango. Fold to combine.
Heat skillet to medium-high. Melt 1 teaspoon coconut oil in the pan. When skillet is warm, add ⅓ cup of batter. Using the back of the measuring cup evenly spread the batter. When the batter bubbles, about 3-4 minutes. Flip the pancake. Cook for an additional 1-2 minutes or until golden brown on both sides.