Brief outline of the talk:
Fundamental Sutrayana teachings including: Four Noble Truths and Eightfold Path; Middle Way; Anatman – as they were a group interested in philosophy I included the Four Denials and Four Philosophical Extremes
Brief outline of different approaches to Buddhism in different schools and vehicles (yanas)
Tantra and Dzogchen
For the last 20 minutes I talked about what it means for me to be a Buddhist, and showed images of some of our retreats and craft projects.
I took questions throughout the talk, rather than waiting till the end as I like the way this makes a talk more relevant for your audience. They said that they would invite me back to talk to them again and I would be delighted to do so.