Combine first five ingredients in a mixing bowl. Add egg, oil, and buttermilk and stir until just blended. Stir in cheeses and herbs until just blended, and pour into greased bread pan (8-1/2 x 4-1/2 x 2-1/2 inches). Bake 45 minutes at 350 F. Cool in pan 5 minutes, then turn onto cooling rack. Serve warm.