You can use either Vita-mix, Green Star juicer, or food processor: simply grind together the sesame seeds, dates and raisins. (Or, you can make it even easier, and use tahini). Add ground flax seed (to boost the nutritional value of your halwa even more).
Add agave if you like it really sweet, and some vanilla – if you like the flavour.
I usually throw in more than one variety of nuts (whatever is at hand).
Also, I add some Goji berries if I have some. In Russia, we make halwa with raw sunflower seeds – taste is different, but is just as good. Scoop with a spoon and enjoy. :-) Or, roll balls and dust with coconut flakes for a terrific presentation.
Enjoy!