Process beans with their liquid in a food processor until smooth.
Add all dry ingredients except vital wheat gluten and pulse until combined.
Add vital wheat gluten and pulse gently, adding water 50g at a time until dough forms little fibres.
Knead the dough by hand to bring together.
Divide the dough into 40g portions. Roll each portion out as thin as possible.
Place the ham slices and grated vegan cheese on one piece of dough. Cover with another piece of dough and seal the edges.
Prepare three bowls for breading: one with breadcrumbs, one with flour, and one with a flour and water mix.
Dredge each cordon bleu in flour, then the wet mix, then breadcrumbs. Repeat for a double coating.
Preheat oven to 180°C (350°F).
Fry each cordon bleu in a heavy-bottomed pan until golden brown on each side.
Bake the fried cordon bleu in the preheated oven for 10-15 minutes.