Add the oats to a food processor and process until they resemble coarse flour. Add the baking soda, cinnamon, salt and nutmeg. Pulse a few more time to mix together.
Mash the bananas in a large bowl until smooth. Add in the eggs and mix well, then add the honey and vanilla and stir. Add the dry mixture to the wet and fold with a rubber spatula until a batter forms.
Put a griddle on medium heat and grease with some of the butter. Drop 1/4 cup of the batter per pancake onto the griddle. Cook the pancakes on each side until golden brown, 2 to 3 minutes per side. Transfer to the warm oven and continue with the remaining batter, adding more butter when needed.
To make the berries, set a dry saute pan over high heat. Add the blueberries and swirl the pan to avoid sticking. Heat until the berries are just starting to change to a deep purple color and beginning to blister and open.
Pour the berries over the pancakes and sprinkle with the coconut if using. Drizzle with the syrup. Serve immediately.