Set out separate bowls or trays before starting. Panjeri is roasted in batches, and each ingredient should be stirred continuously while it cooks.
Warm 1 scoop ghee over medium-high heat. Add the edible gum and stir continuously until the pieces turn white, puff up, and fill with air. Transfer to a bowl and crush lightly once cool.
Add another scoop of ghee to the pan. Add the fox nuts and cook over medium-high heat, stirring continuously, until crisp. Transfer out of the pan.
Lower the heat. Toast the raw cashews and cardamom seeds gently until fragrant, then transfer out of the pan.
Toast the almonds over medium-low heat until they barely begin to change color. Transfer out, then toast the walnuts until crisp and the pistachios until hot and fragrant.
Toast the melon seeds over low heat until crisp and lightly brown, then toast the sesame seeds on low. Keep each batch moving and transfer it out as soon as it is done.
Toast the coconut powder briefly on low, stirring constantly so it does not scorch.
Toast the semolina, amaranth flour, or cassava flour over medium-low heat until hot and slightly darker in color. Add 1 scoop ghee and mash or stir it through until evenly coated and fragrant.
Combine the roasted flour mixture, crushed edible gum, fox nuts, nuts, seeds, coconut, and cardamom in a very large bowl.
If using powdered sugar, jaggery powder, chopped dates, or raisins, let the mixture cool until warm rather than hot, then mix in the sweetener to taste.
Cool completely and store in an airtight container. Serve in small spoonfuls.