The Orchard is the first place I thought of to suggest, but they're closed on Sundays.

I just called Acacia. The citrus salad and fruit plate are the only vegan offerings on their menu, but apparently their chef is happy to come out and discuss options to accommodate people. They would want us to make a reservation.

So, shall we narrow the choice down a bit?

Cafe Nola (Vegan-sympathizer chef, I've had good meals here)

Cacique (Veggie fajitas, etc, and Zen has had good meals here)

Acacia (Chef happy to accommodate dietary needs, unknown quality aside from a very good reputation)