Preheat your oven to 375°F and line a large baking sheet with parchment paper or a silicone baking mat.
In a large mixing bowl, mash the banana thoroughly with a fork until it reaches a smooth consistency with no large lumps.
Add the whole egg and egg whites to the mashed banana, whisking vigorously until the mixture is well combined and slightly frothy.
Fold in the vanilla protein powder, oat flour, cinnamon, baking powder, and sea salt, stirring until a thick and uniform batter forms.
Portion the batter into 6 equal rounds on the prepared baking sheet, using the back of a spoon to gently flatten them into thick discs.
Bake for 12 to 14 minutes until the fritters are firm to the touch and the edges have turned a light golden brown.
While the fritters are baking, whisk the honey and water together in a small ramekin until the glaze is smooth and easily pourable.
Remove the fritters from the oven and drizzle the warm honey glaze over the top of each one before serving immediately.