Long grate or thinly slice the red and yellow onion into a bowl. Use a tea towel or thick kitchen roll to dab dry it as much as possible. You don't want it to be too wet.
Grate the Sweet Potato into the mixture.
Add 1/2 cup of Gram Flour, 1 tsp of Cumin, chopped Coriander,1 tsp of Turmeric, salt and pepper and with your hands mix it all together and form 2 large patties.
Heat some oil in a pan (I use avocado oil) and shallow fry the 2 patties on each side for about 5 minutes until golden brown on each side. Whilst frying make the Piquanté Chutney
Piquanté Chutney
Using your manual blender add 3 baby plum or cherry tomatoes, 1 tablespoon of pickled Piquanté peppers and 1 tablespoon of Tomato Ketchup. Give it a rough chop in the blender.
Construct the Burgers
Build your burgers with your favourite fillings. Ours were as follows: *Seeded Vegan Burger Buns *Bhaji Burgers*Piquanté Chutney*Mixed Salad Leaves*Sliced Gerkins