Start by making fresh chhena (cottage cheese) from full-fat milk. Heat the milk until it boils, then add lemon juice or vinegar to curdle it.
Transfer the strained chhena to a clean surface and mash it well for about 5-7 minutes to make it soft.
In a non-stick pan, add the mashed chhena along with sugar to the pan. Let it cook until it thickens slightly and starts to come together as a dough-like consistency.
Once the chhena mixture thickens, add cardamom powder for a subtle fragrance.
Once the mixture cools down a bit, divide it into small portions and shape them in peda shape.
Garnish the shaped sandesh with slivers of pistachio, almonds, or saffron strands.
Refrigerate the sandesh for at least 1-2 hours to firm up. Once set, serve chilled.