Begin by making the crepes. Combine the chickpea flour with the all-purpose flour and salt in a large bowl and whisk to combine. Add the milk and whisk until smooth. Whisk in the olive oil and let the batter rest for 30 minutes before whisking in the water.
Lightly brush a 7-inch crêpe pan with the butter or olive oil and set it over medium heat. Pour 3 tablespoons of the batter into the pan and swirl the pan to distribute evenly. Cook for 1 minute, or until the edges start to turn brown. Flip the crêpe and cook for 20 seconds before transferring to a large plate. Repeat with the remaining batter.
To make the mushroom filling, melt the butter in a large frying pan over a medium heat. Add the mushrooms and cook until the mushrooms have softened. Add the garlic, cream cheese, white wine and water and stir until smooth. Add the herbs and simmer over a low heat for 5 minutes.
To serve place spoonfuls of the mushroom mixture in the crepes and fold over or roll, whichever is you preference.
The crepes can be cooked up to 4 hours ahead and kept at room temperature before serving.