DCA to Fairfax, looking for one lunch and one dinner with these criteria

I'll be flying into DCA and renting a car to eventually get to Fairfax, willing to detour a bit, but with no real desire of driving into DC proper.

I'll likely be solo diner with focus on food more than atmosphere and service. Alcohol is not a consideration. I'm looking for something unique that's non-chain. Bonus for bold flavors, adventurous ingredients, offal, or standout ethnic, and chef's counter. Or as close to all that as possible.

With time for just one lunch and one dinner, what are your recommendations for me?