Ways to use sesame halva?

There might be some ideas in here for you: https://food52.com/blog/16549-11-sweet-ways-to-use-tahini-and-halva

(Disclaimer: I have never tried this, but...) If it is crumbly enough, I'd try adding it to a cookie/graham cracker pie crust. Especially this gluten free key-lime pie crust from the Washington Post: https://www.washingtonpost.com/pb/recipes/key-lime-pie/15069/

And the coconut in that recipe make me think it would be a great topping for a coconut cake as well.

If you're feeling ambitious, this tahini mousse pie looks delicious: http://food52.com/recipes/41913-tahini-mousse-pie
I'll be following this thread, too, even though I could inhale a container in one sitting! Thin slices are also good with a coffee in the afternoon.

This Ottolenghi recipe is very nice http://www.ottolenghi.co.uk/walnut-and-halva-cake-shop

It's good as a topping for ice cream.