1. The fine variety of vermicelli (also known as seviyan, sev or semiya) can be found in any Indian/Asian grocery store. If you do not get that, feel free to use regular vermicelli and break it into small pieces before roasting in ghee.
2. Rose syrup is available in specialty food stores, Asian, Middle-Eastern or Mediterranean grocery stores. If you do not want the light pink color, you can simply add 1 tsp of rose water to the seviyan along with the cardamom powder and sugar.
3. You can add other nuts like cashew nuts or pistachios as well.
4. Instead of using rose syrup, you can flavor the meethi seviyan with kesar or saffron infused milk. This goes exceptionally well with chopped pistachios as garnish.