A colleague and I were in transit with one full day in Nairobi. A friend suggested Talisman for a lazy Sunday lunch. Fantastic. It's in an unlikely spot, with only a small sign by the road. Once you walk in the front door, you find yourself with lots of seating options, including a small inside bar. Superb and well informed wait staff, great menu with plenty of daily specials. Fantastic food, and made fresh. I'll be recommending Talisman to all my friends who pass through Nairobi.
If you can, make a reservation in advance if you want an outside table, or if it's a busy time. As walk-ins, we were lucky to get an inside table at 1:00 on a Sunday afternoon.