Dry-roast the mixed nuts together in a kadhai and keep aside.
Grind the oats to a fine powder in a blender and keep aside.
Grind the nuts to a fine powder and keep aside.
Grind the dates and raisins till the dates are mushy.
Add the oat flour and nut powder to this along with cardamom seed powder and blend until all the ingredients are blended well. It looks a little like thick and sticky breadcrumbs. If using ghee, add and blend one more time. You know it is done when you place a little of this mixture on your palm and make a fist and the mixture binds and holds together.
Roll into little balls and store in an airtight container.
Lastly grind the raisins and dates and add to the rest and knead with your hand until the mixture starts to come together.