What questions to ask a recruiter during phone screen?

I'll cover this in my upcoming behavioral interview course (I'm filming it now!), but here's my go-tos:

1. "What's the biggest challenge facing the company right now?"
2. "What's the favorite way that you've grown here?"

At a high-level, just ask questions about the company overall and their personal development. There's a ton of good space outside of the technical realm. In fact, I think asking technical questions is a bad use of time even when doing behavioral rounds with engineers/engineering managers. Choice of technology generally isn't that indicative of company quality, it's more about the culture and the quality of people.