Grease or brush a plate with a few drops of ghee and set aside.
In a pan, heat ghee. Once melted, add rajgira flour and roast over medium flame until it turns golden and aromatic. The mixture will become slightly foamy and have a light texture when perfectly roasted.
Lower the flame, then add milk. The mixture will bubble immediately, so stir for a few seconds until it settles down a bit.
Add cardamom powder and grated jaggery, then switch off the flame. Mix well until the jaggery melts completely.
Quickly spread the mixture onto the greased plate. Sprinkle slivered nuts and dried rose petals over it.
Let the mixture cool slightly, then cut it into square or diamond shapes. Allow it to cool completely before storing.
Separate the pieces and store them in an airtight container. Enjoy!