We are only listing places that we've tried personally and can recommend.
http://www.tyddynllan.co.uk/ (approx. 20 mins.)
http://portheirias.com/ in Colwyn Bay (approx. 50 mins.)
http://onthehillrestaurant.co.uk/ in Ruthin (approx. 25 mins.)
The Berwyn Restaurant in Llandrillo (20 mins. away - very reasonable prices - check opening times!)
http://www.galesofllangollen.co.uk/winebar - Llangollen (about 25 mins.)
http://www.watsonsbistroconwy.co.uk/ - Conwy (Conway) - about 55 mins. LOVELY food!
https://www.facebook.com/pages/Alfredos-Italian-Restaurant/248227961864666 - a bit cheaper than Watson's (above) - same location (Conwy)
Nice pub food!
http://www.thegrouseinncarrog.co.uk/ (about 15 mins. away)
https://www.facebook.com/dudleyarmswales/?ref=timeline_chaining - Llandrillo (approx. 20 mins.)
The Crown Inn, Llanfihangel (https://www.facebook.com/pages/The-Crown-Inn-Llanfihangel/609342089272512)
http://leylandarms.co.uk/ (about 15-20 mins. away)
http://www.brunningandprice.co.uk/cornmill/ (Llangollen - about 25 mins. away)
Ordinary cafe grub
https://www.facebook.com/Yum-Yums-312267185569045/?rf=129018327171880 - Corwen (10 mins. away)