Defrost the frozen spinach in the microwave to break up the chunk.
Boil the potato, skin and keep aside to cool.
Heat 1 tbsp oil in a shallow pan, and fry the chopped onions. When the onions starts to brown, reduce the heat and add the salt, turmeric powder, garam masala, chillie powder and coriander powder and saute till all the spices are cooked. Add all the vegetables to the pan, increase the heat and cook till all the moisture is completely gone.
After the vegetables and the potato is cooled down enough to handle, mix the two together using your hand. if the mixture is too wet and soft, add some breadcrumbs till the mixture is strong enough to be held together on its own. Divide the potato-vegetable mixture into equal sized globes, and flatten with the palm to make patties.
Dip the patties in bread crumb, and shallow fry till they start to brown.
Serve with ketchup and hot sauce.