Place the onion in a frying pan and fry on a low heat for a few mins to soften.
Add the carrots to the frying pan with the spices, seasoning and mustard and stir through.
Place the quinoa, black beans, flour and contents of the frying pan, into a bowl and mix together.
Divide the mixture into 4 parts and form 4 individual burger patties with your hands.
Sprinkle flour on to a cutting board and gently pat the patties on to the flour to give a light coating.
Serve on a seeded bread bun with your favourite extras.