Slice the baguette into 4-6, 1" slices and set aside.
In a shallow bowl, whisk together the egg, vanilla extract, and cinnamon.
Add the milk and continue whisking. Set aside.
In a small pot, add the frozen blueberries and lemon juice. Cook over low heat for 3-4 minutes, mashing the blueberries as they cook to help release its juices
Once the blueberries are done cooking, stir in 1 tablespoon of the blueberry juice from the pot into the bowl with the whisked ingredients.
Heat a non-stick pan with coconut oil. Dip each slice of bread into the shallow bowl with the whisked ingredients for 30 seconds on each side.
Cook for 3-4 minutes on each side or until both sides are browned.
Top with the mashed blueberries, and enjoy with maple syrup, confectioners sugar, and/or butter!