My fiancee is from Dayton which has required that I spend some time there.
I can recommend enthusiastically for very solid modern american fare. I'm not a big salad guy but their salads are excellents as were their frites.
The same family owns the Wheat Penny downtown, which I didn't like as much but they have a few very excellent pizzas and burgers. Good spot for a lunch downtown.
Deweys pizza near the University has some very excellent pizzas (my recollection is their red pizzas are much better than their white). Nice is small craft beer list and some interesting topping options.
Also I really enjoyed the newly open toxic brewing company in the oregon district as a spot for quality craft beer.
Meadowlark RestaurantAddress: 5531 Far Hills Ave, Dayton, OH 45429
Phone:(937) 434-4750
Wheat Penny515 Wayne Ave., Dayton, OH 45410
Dewey's Pizza131 Jasper St, Dayton, OH 45409
Phone:(937) 223-0000