Heat a saucepan or skillet over medium heat and add a tsp of oil. Once it is hot, add chopped mushrooms.
On high heat, saute the mushrooms. Mushrooms will start releasing their water.
Let them cook till all the water gets evaporated and switch off the flame.
Now take a mixing bowl and add mashed potatoes, sauteed mushrooms, chopped cilantro leaves, walnuts, salt, ginger paste, garlic paste, and spice powders
Mix this potato mixture well and form a dough out of these.
Make small orange-sized balls out of the dough and shape them into patties.
Roll them over puffed amaranth so that these get coated well.
Take a pan and fry these over medium heat using little oil on both sides.